Subject: small network working From: "angel@chiriqui" angel@............ Date: Sun, 1 Jul 2001 06:17:28 -0500 Hello Everyone, I have a small network up and running in western Panama. I have located several event using only my equipment. You can see one of the locations here. http://200.46.19.177/sismos/ulsis.gif It's only a 13K gif but might be slow to load since it's coming from the end of a very long string of routers and radios. It's a computer at my home in Panama. Just had to tell someone! :) Best regards, angel mailto:angel@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: small network working From: The Lahrs johnjan@........ Date: Sun, 01 Jul 2001 06:46:39 -0600 Hi Angel, I'm very impressed with your accomplishment! It's no small feat to do everything necessary to install a network of stations, process the seismograms, compute the location, depth, and magnitude, and then display the results for the World to see! Cheers, John At 05:17 AM 7/1/2001 , you wrote: >Hello Everyone, > >I have a small network up and running in western Panama. ... John C. Lahr 1925 Foothills Road Golden, CO 80402 Phone: (303) 215-9913 john@........ http://lahr.org/john-jan/science.html __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: small network working From: "Marino De Menech" albalonga@........... Date: Sun, 01 Jul 2001 14:23:12 Hi Angel in Panama, I too wish to congratulate you on your achievement. well done! Marino in Abbotsford, British Columbia, Canada >Hello Everyone, > >I have a small network up and running in western Panama... > >Just had to tell someone! :) > >Best regards, >angel _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: small network working From: CapAAVSO@....... Date: Sun, 1 Jul 2001 15:45:29 EDT In a message dated 7/1/01 12:23:43 PM GMT Daylight Time, angel@............ writes: << I have a small network up and running in western Panama. I have located several event using only my equipment. >> Hello Angel, Congratulations on having your very own network. That's quite an accomplishment that you can be proud of. Are your remote stations battery operated? Are your network stations vertical or horizontal seismometers and what is their period? Have any of the locations repeated? Have you gone to check any location to see if perhaps a quarry is located there? Best regards. Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Winquake bug report From: "Larry Cochrane" cochrane@.............. Date: Sun, 1 Jul 2001 18:35:09 -0700 Barry, Thanks for the bug report. I found and fixed the problem. I will have a new WQ release ready in a few days. -Larry ----- Original Message ----- From: "barry lotz" To: "Larry Cochrane" Sent: Friday, June 29, 2001 7:28 PM Subject: Re: Winquake > Larry > It's the solomon isl 6.4 event of 5/29/01 @ 23:37:22 UTC. The fellow from > Sterlington La had the same problem. Look at his posted event. > Regards > > Barry > > Larry Cochrane wrote: > > > What file are you look at? I don't see it on my system. > > > > -Larry > > > > ----- Original Message ----- > > From: "barry lotz" > > To: > > Sent: Wednesday, June 27, 2001 9:44 PM > > Subject: Winquake > > > > > Hi Larry > > > I noticed something unusual with the v2.6 that I have been using for > > > quite a while now. The Solomon Isl event of 5/29/01 @ 23:37:22 had only > > > the P and S times on the bottom line and no other info. The only unusual > > > property about this event is that the P and S arrivals occur on > > > different days. I thought might want to know. > > > Regards > > > Barry > > > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: piezo-geophone From: james fisher kd6iwd@......... Date: Mon, 2 Jul 2001 13:36:05 -0700 (PDT) jim fisher kd6iwd@......... I made a seismic sensor out of a 1.5 inch piezo disk transducer. In my application I was trying to detect footsteps. I was able to detect footsteps at least 75 feet away. Piezo transducers may be suitable for strong motion transducers or even as general purpose geophones. I adapted the piezo disk to seismic use by placing a 2# hammer head on the disk. The idea was that as the seismic waves passed the disk would see a varying load caused by the inertia of the hammer head. I amplified the resulting signal with a simple op27 amplifier and viewed the output on a oscilliscope. I was able to detect footsteps 75 feet away from the transducer and cars at 2 blocks. If you try using piezo disks be advised that they are very sensitive to sound and to temperature changes which can cause large dc voltages. The oscilliscope I used was an old tube type and had a very bad ac hum problem. 75 feet was the limit of the distance i could see the screen and produce the seismic input. It might pick up footsteps much further away with nouse free amplification and detection. __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: piezo-geophone From: ChrisAtUpw@....... Date: Mon, 2 Jul 2001 19:57:21 EDT In a message dated 02/07/01, kd6iwd@......... writes: > I made a seismic sensor out of a 1.5 inch piezo disk transducer. In my > application I was trying to detect footsteps. I was able to detect > footsteps at least 75 feet away. Piezo transducers may be suitable for > strong motion transducers or even as general purpose geophones. For general purpose use, about 5 gm stuck to the centre with epoxy will give a resonance at about 500 Hz. Max safe load is ~100 gm. To stabilise the temperature adequately, you either need a very good thermostat or to bury them over 18" deep. A MAX420 / 430 or a TLC2201 are probably better amplifiers. It is a good idea to fit a pair of 5 pA catching diodes as these things can generate tens if not hundreds of volts. You can get disks of 50 nF capacity which give reasonably long TC's. Can be an advantage when experimenting / setting up if you put 100 K + a reed switch across the piezo unit to give rapid zeroing. Chris Chapman In a message dated 02/07/01, kd6iwd@......... writes:

I made a seismic sensor out of a 1.5 inch piezo disk transducer. In my
application I was trying to detect footsteps. I was able to detect
footsteps at least 75 feet away. Piezo transducers may be suitable for
strong motion transducers or even as general purpose geophones.
      For general purpose use, about 5 gm stuck to the centre with epoxy
will give a resonance at about 500 Hz. Max safe load is ~100 gm. To stabilise
the temperature adequately, you either need a very good thermostat or to bury
them over 18" deep. A MAX420 / 430 or a TLC2201 are probably better
amplifiers. It is a good idea to fit a pair of 5 pA catching diodes as these
things can generate tens if not hundreds of volts. You can get disks of 50 nF
capacity which give reasonably long TC's. Can be an advantage when
experimenting / setting up if you put 100 K + a reed switch across the piezo
unit to give rapid zeroing.

      Chris Chapman
Subject: The earth moves again in N. California From: "Larry Cochrane" cochrane@.............. Date: Tue, 3 Jul 2001 19:50:26 -0700 Greetings, For the last few months there have been very few earthquakes here in Northern California. Today we had 5 minor events within a few hours. Here's the event listings: 01/07/03 19:02:50 36.70N 121.33W 5.9 4.2Mw A* 11 km S of Tres Pinos, CA 01/07/03 19:07:16 36.68N 121.32W 5.8 4.0Mw C* 12 km S of Tres Pinos, CA 01/07/03 19:31:58 36.70N 121.33W 4.1 3.0Ml A* 11 km S of Tres Pinos, CA 01/07/03 21:57:18 36.70N 121.33W 4.4 3.8Mw A* 11 km S of Tres Pinos, CA 01/07/03 22:13:26 36.69N 121.31W 4.1 3.0Ml A* 12 km S of Tres Pinos, CA and this one yesterday: 01/07/02 17:33:53 36.69N 121.33W 6.3 4.0Mw B* 11 km S of Tres Pinos, CA Tres Pinos is ~120km (75 miles) south of my station. If you are interested in looking at the different responses of different sensors, this would be a good time to look at my event files http://www.seismicnet.com/cgi-dos/event.exe). Here's a short description for each event file: *.LCN, *.LCE and *.LCZ: These are the high gain channels from a Forced-Balance Accelerometer (Kinemetrics FBA-23A). I use this sensor as a reference since it was calibrated at Kinemetrics about two years ago. Maximum acceleration was ~400 ug for the 4.2 event. *.LC1: My N-S Lehman, *.LC8 and *.LC3 my high/low frequency ports of my N-S SG sensor. *.RWN, *.RWE and *.RWZ: There files come from one of the 4.5HZ 3 component used Mark Products L-15B geophones I am selling. For more information on my station and the sensors I am recording please see http://www.seismicnet.com/rwcstation.html. Hopefully mother nature won't produce any larger calibration pulses.... Regards, Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Video cassette recorder From: Casey Crane ogzax@........ Date: Wed, 4 Jul 2001 14:12:11 -0700 Hey all, When things get to quiet on PSN mail I can always ask some "off the wall" question.... Has anyone thought of using a VCR's audio input to record up to six hours of a tone modulated seismic signal ? A person could use two old VCR's on timers to give twelve hours of recording at a time and when an event occurs, you got it on tape to digitize and save. Just a thought. Casey ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Video cassette recorder From: Michael Chang pya_cha@.................. Date: Wed, 04 Jul 2001 17:48:57 -0700 I can think of a few problems: 1. You'd probably need a Hi-Fi VCR to preserve dynamic range, unless you rigged up some companding scheme like an old DBX to use the analog tracks. 2. Consumer VCRs aren't built for continuous duty, so you'd likely encounter high down-time and maintenance cost with older units. Professional VCRs used for surveillance and time-lapse video costs more than a high end computer system. 3. You wouldn't want more than 20 passes on a high quality tape, so costs of consumables will eventually become a factor. Might be easier to use an old computer and sound card with some mod-demodulation scheme. Michael At 02:12 PM 7/4/01 -0700, you wrote: > Has anyone thought of using a VCR's audio input to record up to >six hours of a tone modulated seismic signal ? A person could use two >old VCR's on timers to give twelve hours of recording at a time >and when an event occurs, you got it on tape to digitize and save. > Just a thought. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Video cassette recorder From: ChrisAtUpw@....... Date: Wed, 4 Jul 2001 20:16:06 EDT In a message dated 04/07/01, ogzax@........ writes: > Has anyone thought of using a VCR's audio input to record up to > six hours of a tone modulated seismic signal ? Dear Casey, The short anwser is no. There is no reason in principle why you should not tackle the easier task of reducing the drive speed of conventional tape recorders by a factor of up to ~100 giving say lone to three day's data on one tape and using frequency modulation to handle the very low frequencies. Depends on how long a period you want to store. Even 75 cassette tapes take up quite significant space. Tape is not a very good medium for long term storage. Since you can get CDROM recordable disks which will handle a very wide dynamic range, is it really worth the effort? Regards, Chris Chapman In a message dated 04/07/01, ogzax@........ writes:

  ;      Has anyone thought of using a VCR's audio input to record up to
six hours of a tone modulated seismic signal ?  
Dear Casey,

      The short anwser is no. There is no reason in principle why you should
not tackle the easier task of reducing the drive speed of conventional tape
recorders by a factor of up to ~100 giving say lone to three day's data on
one tape and using frequency modulation to handle the very low frequencies.
Depends on how long a period you want to store. Even 75 cassette tapes take
up quite significant space. Tape is not a very good medium for long term
storage. Since you can get CDROM recordable disks which will handle a very
wide dynamic range, is it really worth the effort?

      Regards,

      Chris Chapman Subject: Re: Video cassette recorder From: Casey Crane ogzax@........ Date: Wed, 4 Jul 2001 18:55:07 -0700 Oh well, It was just a thought. Casey ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Video cassette recorder From: Nashaad Omar mfk@.............. Date: Fri, 06 Jul 2001 06:32:19 -0700 Hi Casey and all, 1. VCRS are not made for use after use with the same tape, and the quality will detoriorate as it passes 15 runs. 2. A medium end computer system with a high quality cam will cost much less and the storage devices are made to run millions of times, and the data for 720 MB can now be easily stored in one CD at home. So thats a lot of time, and each CD costs less than one dollar and the writer device is only <$300. The scenario is clear. With the emergence of widespread webcams, this data can also be transmitted all over the world and recoreded real time in many different places....!!!. Food for thought ?? Nash At 02:12 PM 7/4/01 -0700, you wrote: >Hey all, > > When things get to quiet on PSN mail I can always ask some "off >the wall" question.... > > Has anyone thought of using a VCR's audio input to record up to >six hours of a tone modulated seismic signal ? A person could use two >old VCR's on timers to give twelve hours of recording at a time >and when an event occurs, you got it on tape to digitize and save. > Just a thought. > > > >Casey >________________________________________________________________ >GET INTERNET ACCESS FROM JUNO! >Juno offers FREE or PREMIUM Internet access for less! >Join Juno today! For your FREE software, visit: >http://dl.www.juno.com/get/tagj. >__________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email PSN-L-REQUEST@.............. with >the body of the message (first line only): unsubscribe >See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: PSN file format From: "Travis Farmer" travis5765@................... Date: Sat, 7 Jul 2001 23:33:00 -0400 Is there a simple way to read/write psn files using VB6? I'm trying to make a custom datalogger with VB and would like to have PSN compatible files. My guess is, I would need a component DLL for this. I have somewhat looked over the psn format source but was pretty much dumbfounded as I do not have much experience with C (or is it C++?) so I would not be able to write the DLL myself. Any ideas? Tips? Thanks, ~Travis __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: R: PSN file format From: "Mauro Mariotti" mariottim@............ Date: Sun, 8 Jul 2001 08:20:50 +0200 Maybe you can use the ASCII format. Anyway VB uses very well binary format for read/write file structures like used in Winquake. You can build a read/write routine entirely in VB without problems and without using DLLs. If you want use the binary format of WQ (i.e. PSN4 ) you can download the record format and after analyzed it you can easily build a basci routine for that format. Is'nt it Larry? Mauro ----- Original Message ----- From: Travis Farmer To: Sent: Sunday, July 08, 2001 5:33 AM Subject: PSN file format > Is there a simple way to read/write psn files using VB6? > I'm trying to make a custom datalogger with VB and would like to have PSN > compatible files. > > My guess is, I would need a component DLL for this. > I have somewhat looked over the psn format source but was pretty much > dumbfounded as I do not have much experience with C (or is it C++?) so I > would not be able to write the DLL myself. > > Any ideas? Tips? > > Thanks, > ~Travis > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: piezo-geophone From: ChrisAtUpw@....... Date: Sun, 8 Jul 2001 10:20:29 EDT In a message dated 02/07/01, kd6iwd@......... writes: > I made a seismic sensor out of a 1.5 inch piezo disk transducer. In my > application I was trying to detect footsteps. I was able to detect > footsteps at least 75 > feet away. Piezo transducers may be suitable for strong motion transducers > or even as general purpose geophones. With a 60 gm load on a 1/4" dia. central rod, the resonant disk frequency seems to be about 20 Hz. I found that my disks cracked at loads between 1.2 and 1.4 Kg dead weight on a central 1/4" dia rod stuck on with epoxy. With a LCT2201 amp, the piezo of 50 nF capacity seems to work OK into 10 M Ohm (T=0.5 sec). A direct comparison with a L15B vertical geophone indicated that the piezo was giving about 5x the output. It should not be difficult to provide some oil damping for the piezo mass. There seems to be adequate performance from piezo devices to make them useful in principle for short period work. [Remembering that force = mass x acceleration, adding a mass maybe a hundred times the mass of the disk on it's own produces a huge increase in the output.] Regards, Chris Chapman In a message dated 02/07/01, kd6iwd@......... writes:

I made a seismic sensor out of a 1.5 inch piezo disk transducer. In my
application I was trying to detect footsteps. I was able to detect
footsteps at least 75
feet away. Piezo transducers may be suitable for strong motion transducers
or even as general purpose geophones.

      With a 60 gm load on a 1/4" dia. central rod, the resonant disk
frequency seems to be about 20 Hz. I found that my disks cracked at loads
between 1.2 and 1.4 Kg dead weight on a central 1/4" dia rod stuck on with
epoxy. With a LCT2201 amp, the piezo of 50 nF capacity seems to work OK into
10 M Ohm (T=0.5 sec). A direct comparison with a L15B vertical geophone
indicated that the piezo was giving about 5x the output. It should not be
difficult to provide some oil damping for the piezo mass. There seems to be
adequate performance from piezo devices to make them useful in principle for
short period work. [Remembering that force = mass x acceleration, adding a
mass maybe a hundred times the mass of the disk on it's own produces a huge
increase in the output.]

      Regards,

      Chris Chapman Subject: Re: PSN file format From: "Larry Cochrane" cochrane@.............. Date: Sun, 8 Jul 2001 16:10:51 -0700 Please don't use the ASCII "format". It's not an official format. It was something I added to WinQuake so people could export event files in a format that could easily be used by analytical programs like MATLAB. It is NOT meant for a datalogger output format. New dataloggers should use the PSN Type 4 binary format. -Larry Cochrane ----- Original Message ----- From: "Mauro Mariotti" To: Sent: Saturday, July 07, 2001 11:20 PM Subject: R: PSN file format > Maybe you can use the ASCII format. > Anyway VB uses very well binary format for read/write file structures like > used in Winquake. > You can build a read/write routine entirely in VB without problems and > without using DLLs. > If you want use the binary format of WQ (i.e. PSN4 ) you can download the > record format and > after analyzed it you can easily build a basci routine for that format. > Is'nt it Larry? > > Mauro > > > ----- Original Message ----- > From: Travis Farmer > To: > Sent: Sunday, July 08, 2001 5:33 AM > Subject: PSN file format > > > > Is there a simple way to read/write psn files using VB6? > > I'm trying to make a custom datalogger with VB and would like to have PSN > > compatible files. > > > > My guess is, I would need a component DLL for this. > > I have somewhat looked over the psn format source but was pretty much > > dumbfounded as I do not have much experience with C (or is it C++?) so I > > would not be able to write the DLL myself. > > > > Any ideas? Tips? > > > > Thanks, > > ~Travis > > > > > > __________________________________________________________ > > > > Public Seismic Network Mailing List (PSN-L) > > > > To leave this list email PSN-L-REQUEST@.............. with > > the body of the message (first line only): unsubscribe > > See http://www.seismicnet.com/maillist.html for more information. > > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: R: PSN file format From: "Mauro Mariotti" mariottim@............ Date: Mon, 9 Jul 2001 07:34:44 +0200 Larry, excuse me for loving ASCII format. But i think you should consider the utility of the ascii format and don't abandon it. A good binary header even if will be good in the very sense of the word (as without doubt PSN4 is) is always limited to his structure. The power of popular software like Excel, Access an so on (mathlab) is that they can treat any kind of ascii files using a programmable record separator and a field separator. Windows too uses the INI files that are always ASCII. In the majority of the cases using ascii file you can add and remove a field without losing the compatibility with higher and lower versions. I'm planning (with my 6smowin datalogger) to build an ascii programmable format with definitions on where you want have any field in the header and how the field will be setup by the event generator. One Italian researcher of the Italian Seismic Service suggested to have all files in ASCII with ONE line of header (in ascii too) with formatted text or with a field separator. This beacause all softwares used by universities are prepared to read one single line of header with formatted fields, always in ascii. If i'm not in wrong, Mars Light station, removed the use of the header! The out only with a RAW Ascii file! So, sorry to make these considerations in the mailinglist, but i think they will be usefuls to others that are considering to write some kinds of dataloggers. You said, ascii format is not official, i'm saying: this non officiality is its power! Warmly Mauro ----- Original Message ----- From: Larry Cochrane To: Sent: Monday, July 09, 2001 1:10 AM Subject: Re: PSN file format > Please don't use the ASCII "format". It's not an official format. It was > something I added to WinQuake so people could export event files in a format > that could easily be used by analytical programs like MATLAB. It is NOT > meant for a datalogger output format. New dataloggers should use the PSN > Type 4 binary format. > > -Larry Cochrane > > > ----- Original Message ----- > From: "Mauro Mariotti" > To: > Sent: Saturday, July 07, 2001 11:20 PM > Subject: R: PSN file format > > > > Maybe you can use the ASCII format. > > Anyway VB uses very well binary format for read/write file structures like > > used in Winquake. > > You can build a read/write routine entirely in VB without problems and > > without using DLLs. > > If you want use the binary format of WQ (i.e. PSN4 ) you can download the > > record format and > > after analyzed it you can easily build a basci routine for that format. > > Is'nt it Larry? > > > > Mauro > > > > > > ----- Original Message ----- > > From: Travis Farmer > > To: > > Sent: Sunday, July 08, 2001 5:33 AM > > Subject: PSN file format > > > > > > > Is there a simple way to read/write psn files using VB6? > > > I'm trying to make a custom datalogger with VB and would like to have > PSN > > > compatible files. > > > > > > My guess is, I would need a component DLL for this. > > > I have somewhat looked over the psn format source but was pretty much > > > dumbfounded as I do not have much experience with C (or is it C++?) so I > > > would not be able to write the DLL myself. > > > > > > Any ideas? Tips? > > > > > > Thanks, > > > ~Travis > > > > > > > > > __________________________________________________________ > > > > > > Public Seismic Network Mailing List (PSN-L) > > > > > > To leave this list email PSN-L-REQUEST@.............. with > > > the body of the message (first line only): unsubscribe > > > See http://www.seismicnet.com/maillist.html for more information. > > > > > > > __________________________________________________________ > > > > Public Seismic Network Mailing List (PSN-L) > > > > To leave this list email PSN-L-REQUEST@.............. with > > the body of the message (first line only): unsubscribe > > See http://www.seismicnet.com/maillist.html for more information. > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format From: "Larry Cochrane" cochrane@.............. Date: Mon, 9 Jul 2001 00:18:53 -0700 Mauro, I just ran an experiment. I saved a PSN Type 4 file to a ASCII file. The original file was 84k long or ~7 minutes of data at 100 SPS. The ASCII file was 367k in length, that's over 4 times bigger then the original. That's the main reason to save data like this in binary format. In fact, I would like to compress the data so the event files are even smaller. Saving a lot of event files in ASCII format means 4 times more disk space, more backup storage if you backup your files, and 4 times longer to download them over the internet. Since I archive the event files for the PSN, keeping each event file as small as possible is important too me. This is why my system will not except them if you try to send one to my event archive email address. Looking at last months directory (06/2001) I see 190 files using over ~25 megabytes of disk space. That would be over 100 mb if they were all in the ASCII format. More comments below.... > Larry, > excuse me for loving ASCII format. > But i think you should consider the utility of the ascii format and don't > abandon it. > A good binary header even if will be good in the very sense of the word (as > without doubt PSN4 is) > is always limited to his structure. Sorry, not true. The new format (http://www.seismicnet.com/psnformat4.html) has a fixed section and a variable header section. With the variable header, one can add new data field without interfering with old versions of WinQuake or other programs that can read in the data. Recently I added new fields to the PSN Type 4 format. Older versions of WinQuake would skip this data, newer versions can display and modify the new information with out any problems. BTW, the new fields are not saved or read in using the ASCII version. I do not want to support two formats.... >The power of popular software like > Excel, Access an so on (mathlab) > is that they can treat any kind of ascii files using a programmable record > separator and a field separator. And that's why I added the ability to import/export event files in an ASCII format. That doesn't mean they need to be stored in the format. > Windows too uses the INI files that are always ASCII. In the majority of the > cases using > ascii file you can add and remove a field without losing the compatibility > with higher and lower versions. There's a big difference between an event file with lots of samples and an INI file. For what's it worth all of my INI files are ASCII. As far as losing compatibility see above. -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: R: PSN file format From: "Mauro Mariotti" mariottim@............ Date: Mon, 9 Jul 2001 14:08:28 +0200 Larry, of course, ascii files are longer. Anyway i don't want to criticize your choices for Winquake and sdr but only to examine practical aspects. About the increasing of disk space i think this is not a big problem. Using compressed archives (with winzip for example) the size become very small. On the expandibilty of PSN4 format (touchè) i'm not examined it well even if the expandibilty of a binary record is not too easy to manage especially for people that wants to stick one standard but is not so much expert on programming tecniques. Larry, really i don't want to criticize your PSN4 format. I did not discussed it when you done it with other psn members, i was'nt expert enough to do it. Now i am more expert and after analized the needs of the seismic amateurs i believe that an open, clear, easy to read, user friendly format is needed, even if it is very long in space. Hard disk space is very cheap now. You can purchase a 10 Gbytes for 120 dollars! You can have a CD disk for 0.5 dollars and purchase a CD writer for less than 200 dollars. Space is not (in my opinion) a problem. Using archive compressor the 8 char filename length is a problem. Your winquake when access a database of events do a great work analizying and reporting date time location and comments on the file you're opening. If the events file are compressed you cant'do that with winquake. Using long names you could create a database readable with Computer Resource of windows creating filenames like: 20000701_145023_PG_E-W_KURILI-ISLANDS_M6.5.TXT I think you should modify SDR to use long names. If i'm not in wrong SDR is DOS based and this can't be done. Anyway this is my viewpoint: Files should be:, readable, portable, opened, not closed to a single application. This is a REAL need here in Italy (maybe in your country PSN has different needs.) but here, where each university uses a different format, we must mantains all things more portable. Surely this can cause more confusions but any kind of problem will be solved in a few moments by an expert person without expending a lot of time and resources to understand one format or one another. PS: In 6smowin i archives logger files daily in binary format (pure 16 bits format) it generates an ASCII text reference for each binary file with info about how that data has been collected. Raw data are in binary user data are in ascii... Warmly Mauro __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: PSN file format From: "Travis Farmer" travis5765@................... Date: Mon, 9 Jul 2001 09:12:34 -0400 How about this, an application that runs from command line that given a directory or file, converts the file or files in bulk to the PSN4 format. Then an INI with stored information to fill in the headers not provided in the ASCII file. With this, you then only need to specify the ASCII file structure needed. ~Travis -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@................. Behalf Of Mauro Mariotti Sent: Monday, July 09, 2001 8:08 AM To: psn-l@.............. Subject: R: PSN file format Larry, of course, ascii files are longer. Anyway i don't want to criticize your choices for Winquake and sdr but only to examine practical aspects. About the increasing of disk space i think this is not a big problem. Using compressed archives (with winzip for example) the size become very small. On the expandibilty of PSN4 format (touchè) i'm not examined it well even if the expandibilty of a binary record is not too easy to manage especially for people that wants to stick one standard but is not so much expert on programming tecniques. Larry, really i don't want to criticize your PSN4 format. I did not discussed it when you done it with other psn members, i was'nt expert enough to do it. Now i am more expert and after analized the needs of the seismic amateurs i believe that an open, clear, easy to read, user friendly format is needed, even if it is very long in space. Hard disk space is very cheap now. You can purchase a 10 Gbytes for 120 dollars! You can have a CD disk for 0.5 dollars and purchase a CD writer for less than 200 dollars. Space is not (in my opinion) a problem. Using archive compressor the 8 char filename length is a problem. Your winquake when access a database of events do a great work analizying and reporting date time location and comments on the file you're opening. If the events file are compressed you cant'do that with winquake. Using long names you could create a database readable with Computer Resource of windows creating filenames like: 20000701_145023_PG_E-W_KURILI-ISLANDS_M6.5.TXT I think you should modify SDR to use long names. If i'm not in wrong SDR is DOS based and this can't be done. Anyway this is my viewpoint: Files should be:, readable, portable, opened, not closed to a single application. This is a REAL need here in Italy (maybe in your country PSN has different needs.) but here, where each university uses a different format, we must mantains all things more portable. Surely this can cause more confusions but any kind of problem will be solved in a few moments by an expert person without expending a lot of time and resources to understand one format or one another. PS: In 6smowin i archives logger files daily in binary format (pure 16 bits format) it generates an ASCII text reference for each binary file with info about how that data has been collected. Raw data are in binary user data are in ascii... Warmly Mauro __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN Type 4 files From: "Larry Cochrane" cochrane@.............. Date: Mon, 9 Jul 2001 16:14:52 -0700 Bob, Currently only my SDR version 4.x produces event files in the PSN Type 4 format, that I know of. You can convert them to the new format using WinQuake 2.7.x. If you add additional information about your sensor in the sensor.dat file WinQuake will us it when converting type 2 and 3 event files to the new format. The sensor.dat file is a standard text file so you can use any text editor to add the information. The file shipped with WQ 2.7 release has several of my sensors in it that can be used a template or reference. -Larry ----- Original Message ----- From: "Lewis, Bob" To: Sent: Monday, July 09, 2001 5:04 AM Subject: PSN Type 4 files > > Larry: > > I have noticed that when I post a file, that it is not a PSN Type 4 file (no > asterisk). > Is this a function of Winquake or EMON, which I use to record? > > Is there something that I need to do in Winquake to "enable" this function > or something like that? > > Thanks... __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format and long file names. From: "Larry Cochrane" cochrane@.............. Date: Mon, 9 Jul 2001 20:00:48 -0700 Mauro, Not to beat a dead horse I will only make a few more comments about ASCII verses Binary. I do want to get some feedback from other members on long file name standard for the PSN event files. Mauro Mariotti wrote: > On the expandibilty of PSN4 format (touchè) i'm not examined it well > even if the expandibilty of a binary record is not too easy to manage > especially > for people that wants to stick one standard but is not so much expert on > programming tecniques. First, its not that much more difficult to deal with binary files.... Also, I don't think a standard should be created or designed around the ability of someone's programming skills. This is not to say it should be so complicated, like the SEED format, that even a skilled programmer has problems extracting data from it. > > Using archive compressor the 8 char filename length is a problem. > Your winquake when access a database of events do a great work analizying > and reporting > date time location and comments on the file you're opening. > If the events file are compressed you cant'do that with winquake. > Using long names you could create a database readable with Computer Resource > of windows > creating filenames like: > > 20000701_145023_PG_E-W_KURILI-ISLANDS_M6.5.TXT > > I think you should modify SDR to use long names. > If i'm not in wrong SDR is DOS based and this can't be done. > Anyway this is my viewpoint: Since SDR is a DOS program it is limited to the 8.3 format. WinQuake and my archival system could save the files using a longer name. I would like to start a discussion on the new file name format. You can see Mauro proposal above. I propose a shorter format: YYYYMMDD.HHMMSS.COMPONENT_TYPE.SENSOR_ID.PSN Example: 20010705.234505.bhz.lc1.psn This is similar to how other seismic data archive systems on the net store event files. The first two set of numbers are the date and time followed by the component type like BHZ or LHN and then the sensor ID, this can be 2 to 6 characters long. By ending the file in PSN, Windows can associate it as an event file and open it with a program like WinQuake if someone clicks on the file name using Explorer. Maybe just 2 characters for the year would be ok? This will become a problem in about 90 years! Anyone else want to suggest a format? -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format and long file names. From: Karl Cunningham karlc@.......... Date: Mon, 09 Jul 2001 22:45:28 -0700 Larry -- I like the idea of having one filename extension associated with PSN4-format files. The present method of using a different three-character extension for each sensor makes handling these extensions using the usual Windows file type associations almost impossible. From SDR's point of view, if people are running SDR from a Windows 95 or 98 machine booted to dos, doesn't that arrangement support long file names? I believe naming files according to a system used by other organizations is desireable. I think there may come a time when data is shared between networks much more than it is now. Karl --On Monday, July 09, 2001 20:00 -0700 Larry Cochrane wrote: >> creating filenames like: >> >> 20000701_145023_PG_E-W_KURILI-ISLANDS_M6.5.TXT >> >> I think you should modify SDR to use long names. >> If i'm not in wrong SDR is DOS based and this can't be done. >> Anyway this is my viewpoint: > > Since SDR is a DOS program it is limited to the 8.3 format. WinQuake and > my archival system could save the files using a longer name. I would like > to start a discussion on the new file name format. You can see Mauro > proposal above. I propose a shorter format: > > YYYYMMDD.HHMMSS.COMPONENT_TYPE.SENSOR_ID.PSN > > Example: 20010705.234505.bhz.lc1.psn > > This is similar to how other seismic data archive systems on the net store > event files. > > The first two set of numbers are the date and time followed by the > component type like BHZ or LHN and then the sensor ID, this can be 2 to 6 > characters long. By ending the file in PSN, Windows can associate it as > an event file and open it with a program like WinQuake if someone clicks > on the file name using Explorer. Maybe just 2 characters for the year > would be ok? This will become a problem in about 90 years! Anyone else > want to suggest a format? __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format and long file names. From: Bob Smith bobsmith5@........ Date: Tue, 10 Jul 2001 06:51:14 -0400 A brief comment on relative (binary vs. ASCII) file formats from a non seismologist, non-PSNer. I suspect that *once compressed* by a good file compression program such as PKZIP or WINZIP, the size difference will be much less that you might think at first. Consider: 1. Expanding a binary file to ASCII format does not, indeed *cannot*, add information to the file (unless, of course, the conversion program modifies the information content of the binary file in the process but, then you are not comparing apples to apples anymore.) 2. The goal of a good *lossless* compression program program (PKZIP / WINZIP) is to eliminate redundancies and minimize entropy. The information content of the compressed file is identical to the original file (thus loss less). As a practical exercise, I suggest that someone, I don't have access to sample files, convert a few binary format files to ASCII, compress them both and compare both the pre compressed and post compressed files and their size ratios. Sincerely, Bob Smith Larry Cochrane wrote: > > Mauro, > > Not to beat a dead horse I will only make a few more comments about ASCII > verses Binary. I do want to get some feedback from other members on long > file name standard for the PSN event files. > > Mauro Mariotti wrote: > > > On the expandibilty of PSN4 format (touchè) i'm not examined it well > > even if the expandibilty of a binary record is not too easy to manage > > especially > > for people that wants to stick one standard but is not so much expert on > > programming tecniques. > > First, its not that much more difficult to deal with binary files.... Also, > I don't think a standard should be created or designed around the ability of > someone's programming skills. This is not to say it should be so > complicated, like the SEED format, that even a skilled programmer has > problems extracting data from it. > > > > > Using archive compressor the 8 char filename length is a problem. > > Your winquake when access a database of events do a great work analizying > > and reporting > > date time location and comments on the file you're opening. > > If the events file are compressed you cant'do that with winquake. > > Using long names you could create a database readable with Computer > Resource > > of windows > > creating filenames like: > > > > 20000701_145023_PG_E-W_KURILI-ISLANDS_M6.5.TXT > > > > I think you should modify SDR to use long names. > > If i'm not in wrong SDR is DOS based and this can't be done. > > Anyway this is my viewpoint: > > Since SDR is a DOS program it is limited to the 8.3 format. WinQuake and my > archival system could save the files using a longer name. I would like to > start a discussion on the new file name format. You can see Mauro proposal > above. I propose a shorter format: > > YYYYMMDD.HHMMSS.COMPONENT_TYPE.SENSOR_ID.PSN > > Example: 20010705.234505.bhz.lc1.psn > > This is similar to how other seismic data archive systems on the net store > event files. > > The first two set of numbers are the date and time followed by the component > type like BHZ or LHN and then the sensor ID, this can be 2 to 6 characters > long. By ending the file in PSN, Windows can associate it as an event file > and open it with a program like WinQuake if someone clicks on the file name > using Explorer. Maybe just 2 characters for the year would be ok? This will > become a problem in about 90 years! Anyone else want to suggest a format? > > -Larry Cochrane > Redwood City, PSN > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- --------- Avoid computer viruses -- Practice safe hex ------------- * * Specializing in small, cost effective embedded control systems * * Robert L. (Bob) Smith Smith Machine Works, Inc. internet bobsmith5@.............. Lumlay Road landline 804/745-1065 Richmond, Virginia 23236+1004 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: R: PSN file format and long file names. From: "Mauro Mariotti" mariottim@............ Date: Tue, 10 Jul 2001 13:49:05 +0200 In my experiments: binary data can be compressed with a considerable amount of space. ascii data can be compressed saving an enormous amount of space more than 70% the result, due to the higher dimensions of ascii files for the same number of samples, are the same, in other words a compressed ascii file and a compressed binary file uses the same space. This is obvious because the quantity of information is the same. The interesting thing is that using compressed files AND long file names you can archive events that remains easily identifiable by the name itself, if need one you can expand it and view it with winquake or an other event viewer. Mauro ----- Original Message ----- From: Bob Smith To: Sent: Tuesday, July 10, 2001 12:51 PM Subject: Re: PSN file format and long file names. > A brief comment on relative (binary vs. ASCII) file formats from a non > seismologist, non-PSNer. > > I suspect that *once compressed* by a good file compression program such > as PKZIP or WINZIP, the size difference will be much less that you might > think at first. Consider: > > 1. Expanding a binary file to ASCII format does not, indeed *cannot*, > add information to the file (unless, of course, the conversion program > modifies the information content of the binary file in the process but, > then you are not comparing apples to apples anymore.) > > 2. The goal of a good *lossless* compression program program (PKZIP / > WINZIP) is to eliminate redundancies and minimize entropy. The > information content of the compressed file is identical to the original > file (thus loss less). > > As a practical exercise, I suggest that someone, I don't have access to > sample files, convert a few binary format files to ASCII, compress them > both and compare both the pre compressed and post compressed files and > their size ratios. > > Sincerely, Bob Smith > > > > Larry Cochrane wrote: > > > > Mauro, > > > > Not to beat a dead horse I will only make a few more comments about ASCII > > verses Binary. I do want to get some feedback from other members on long > > file name standard for the PSN event files. > > > > Mauro Mariotti wrote: > > > > > On the expandibilty of PSN4 format (touchè) i'm not examined it well > > > even if the expandibilty of a binary record is not too easy to manage > > > especially > > > for people that wants to stick one standard but is not so much expert on > > > programming tecniques. > > > > First, its not that much more difficult to deal with binary files.... Also, > > I don't think a standard should be created or designed around the ability of > > someone's programming skills. This is not to say it should be so > > complicated, like the SEED format, that even a skilled programmer has > > problems extracting data from it. > > > > > > > > Using archive compressor the 8 char filename length is a problem. > > > Your winquake when access a database of events do a great work analizying > > > and reporting > > > date time location and comments on the file you're opening. > > > If the events file are compressed you cant'do that with winquake. > > > Using long names you could create a database readable with Computer > > Resource > > > of windows > > > creating filenames like: > > > > > > 20000701_145023_PG_E-W_KURILI-ISLANDS_M6.5.TXT > > > > > > I think you should modify SDR to use long names. > > > If i'm not in wrong SDR is DOS based and this can't be done. > > > Anyway this is my viewpoint: > > > > Since SDR is a DOS program it is limited to the 8.3 format. WinQuake and my > > archival system could save the files using a longer name. I would like to > > start a discussion on the new file name format. You can see Mauro proposal > > above. I propose a shorter format: > > > > YYYYMMDD.HHMMSS.COMPONENT_TYPE.SENSOR_ID.PSN > > > > Example: 20010705.234505.bhz.lc1.psn > > > > This is similar to how other seismic data archive systems on the net store > > event files. > > > > The first two set of numbers are the date and time followed by the component > > type like BHZ or LHN and then the sensor ID, this can be 2 to 6 characters > > long. By ending the file in PSN, Windows can associate it as an event file > > and open it with a program like WinQuake if someone clicks on the file name > > using Explorer. Maybe just 2 characters for the year would be ok? This will > > become a problem in about 90 years! Anyone else want to suggest a format? > > > > -Larry Cochrane > > Redwood City, PSN > > > > __________________________________________________________ > > > > Public Seismic Network Mailing List (PSN-L) > > > > To leave this list email PSN-L-REQUEST@.............. with > > the body of the message (first line only): unsubscribe > > See http://www.seismicnet.com/maillist.html for more information. > > -- > > --------- Avoid computer viruses -- Practice safe hex ------------- > * * Specializing in small, cost effective embedded control systems * * > Robert L. (Bob) Smith Smith Machine Works, Inc. > internet bobsmith5@........ 9900 Lumlay Road > landline 804/745-1065 Richmond, Virginia 23236+1004 > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Unknown Event From: Karl Cunningham karlc@.......... Date: Tue, 10 Jul 2001 06:53:30 -0700 Hi All -- Did anyone detect an event on 7/8/01 at about 22:25 UTC or so? I got fairly large surface waves starting about 22:40. Started seeing it at about 22:27 and lasted 'till about 22:52. I'm in Southern California. I haven't seen anything on the lists. Karl __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Cover for seismo From: "dan stevens" dlstevens69@........... Date: Tue, 10 Jul 2001 18:03:07 When building a cover for my Lehman what considerations should I take into account? Obviously air currents are the main thing I'm trying to cut out, but what about temperature and critters? The seismo is located inside a windowless room that is kept at a constant temperature year-round. I'm also hoping to use plexiglass, glass, or anything that I can see through. Is the thickness of the material used very crucial? Does anyone have any pre-construction tips or pointers that would be helpful? -dan _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: "Ron Westfall" westfall@........ Date: Tue, 10 Jul 2001 12:24:24 -0700 A simple cover will reduce air currents but it will not eliminate them altogether. Convective circulation of air will still occur inside the cover due to small temperature differences. To get truly stagnant air inside the cover, it is necessary to create a temperature gradient between the bottom and top of the cover. The top should be warmer than the bottom to eliminate convective circulation. A number of mechanisms can be created to do this (small light bulbs at the top of the box, etc.). I found that most solutions generate too much power and the generated heat is too localized at one spot at the inside top of the cover. What I ended up doing was to buy a bunch of ordinary (cheap) 1/4 (or 1/2) watt resistors and solder them end to end. I also put heat shrink tubing over the chain of resistors for insulation. I hooked the resistors directly across 115V AC power run to the box via a cord. The cumulative resistance was chosen so that each resistor did not consume more than its rated maximum of 1/4 (or 1/2) watt and so that the chain of resistors in total generated the desired 5 or 10 watts. Keep in mind that AC power is a sine wave which has to be taken into consideration when calculating power consumption i.e 115V is the peak voltage, not the average voltage. Terminal strips can be used to anchor the chain (or chains) of resistors to the inside top of the cover. One highly desirable aspect of the resistor chain is that the heat is generated in a distributed fashion. By laying out the chain (or chains) evenly across the inside top cover, you get even heat generation and more evenly stagnant air. The solution has the advantage of not requiring power supplies and the components are pretty cheap. Keeping critters out is good too. I have heard people on the list grump about spiders who like to build their webs using the seismo boom as an anchor point. IMHO, I would get a cover material that is moderately stiff. If you were to suddenly close the door of the room where the seismo is located, there will be a small impulse air pressure change in the room depending on the size of the room and the presence of any other openings. A flimsy cover might move enough to generate a small amount of vibration. I use 1/4" masonite which seems to work reasonably well. When I open the door, I can see a very small amount of noise on the trace, but to tell you the truth, I am not sure if it is due to air pressure or vibration transmitted through the concrete floor. Ron Westfall > When building a cover for my Lehman what considerations should I take into > account? Obviously air currents are the main thing I'm trying to cut out, > but what about temperature and critters? The seismo is located inside a > windowless room that is kept at a constant temperature year-round. I'm also > hoping to use plexiglass, glass, or anything that I can see through. Is the > thickness of the material used very crucial? Does anyone have any > pre-construction tips or pointers that would be helpful? > -dan __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: CapAAVSO@....... Date: Tue, 10 Jul 2001 18:13:16 EDT In a message dated 7/10/01 7:09:20 PM GMT Daylight Time, dlstevens69@........... writes: << When building a cover for my Lehman what considerations should I take into account? Obviously air currents are the main thing I'm trying to cut out, but what about temperature and critters?........ I'm also hoping to use plexiglass, glass, or anything that I can see through. Is the thickness of the material used very crucial? Does anyone have any pre-construction tips or pointers that would be helpful? >> Hello Dan I had very good luck building a cover for my Lehman with the Plexiglas sold at Home Depot for replacing broken windows. Use one of the tool they sell to cut it into pieces for the size box you want. You can make a nice neat box by putting a piece of 1/4 X 1/4 inch wood in the right angle corners of your box. Find a hobby store that caters to adults who fly radio controlled airplanes. These stores carry a lot of real handy stuff for fixing the planes when they crash which sometimes happens. In this store you will find four foot lengths of 1/4 X 1/4 inch Balsa wood. While you are there buy some Cyanoacrylate Glue that hardens in 30 seconds. Get the gap filling type. Glue a piece of this wood to the edge of the Plexiglas where you are going to make a right angle corner. Put (not too much) glue on the strip of wood and place it exactly at the edge of the piece of Plexiglas where you want it. After a few seconds you can't move it so make sure you get it right the first time. Now put a thin line of glue on the other side of the wood and press the other piece of Plexiglas in place. If you are careful you should end up with a nice neat box for your Lehman. If you live where a hobby store would be far away, you can get the stuff you need from "Balsa USA". call them at 1 800 225 7287 Most any hardware store sells Plexiglas and the tool to cut it. Good luck, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: "dan stevens" dlstevens69@........... Date: Tue, 10 Jul 2001 22:48:05


Cap,

Thanks for the building tips. The store where I get the best price on plexiglass has many different sizes - anywhere from 2m m and up. Is there any advantage to using a thicker pane, such as 1/4" vs 1/8", or could I go as thin as say 5mm?  Needles s to say the thinner the cheaper! -dan


Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

Subject: Re: Cover for seismo From: Bob Smith bobsmith5@........ Date: Tue, 10 Jul 2001 19:26:33 -0400 Ron Westfall wrote: > > A simple cover will reduce air currents but it will not eliminate them > altogether. Convective circulation of air will still occur inside the > cover due to small temperature differences. To get truly stagnant air > inside the cover, it is necessary to create a temperature gradient between > the bottom and top of the cover. The top should be warmer than the bottom > to eliminate convective circulation. > > A number of mechanisms can be created to do this (small light bulbs at the > top of the box, etc.). I found that most solutions generate too much power > and the generated heat is too localized at one spot at the inside top of > the cover. > > What I ended up doing was to buy a bunch of ordinary (cheap) 1/4 (or 1/2) > watt resistors and solder them end to end. I also put heat shrink tubing > over the chain of resistors for insulation. I hooked the resistors directly > across 115V AC power run to the box via a cord. The cumulative resistance was > chosen so that each resistor did not consume more than its rated maximum of > 1/4 (or 1/2) watt and so that the chain of resistors in total generated the > desired 5 or 10 watts. Keep in mind that AC power is a sine wave which has > to be taken into consideration when calculating power consumption i.e 115V is > the peak voltage, not the average voltage. There seems to be a bit of a misunderstanding here. Domestic mains power (the wall outlet kind) be it 110V AC, 117V AC, 120V AC (the most common modern standard) or whatever your local system provides is the voltage rating in R.M.S. (Root Mean Square) voltage. Without getting into a short course in electrical engineering, RMS voltage is the equivalent of an equal DC voltage in terms of heating power. The peak voltage of the sinewave is the square root of two times the RMS. For 115V AC mains this is about 163 Volts peak or 325 Volts peak to peak. Just hang a good o'scope on the line to verify this. Thus the smallest value 1/4W resistor that can safely be placed across a 115V AC main is 52,900 Ohms. P=E^2 / R == 115^2 / 52900 == 13,225 / 52900 == 0.250 W. I agree that the technique of stringing together a large number of resistors is a good approach. Some 20 years back, I built a quartz crystal based standard frequency oscillator. Quartz crystals must be oven stabilized for maximum stability. I used a long string of resistors epoxied to the oscillator circuit board as a heater and a thermistor driven feedback loop to control the power input to the heater string. Results were quite good. Terminal strips can be used to > anchor the chain (or chains) of resistors to the inside top of the cover. > > One highly desirable aspect of the resistor chain is that the heat is > generated in a distributed fashion. By laying out the chain (or chains) > evenly across the inside top cover, you get even heat generation and more > evenly stagnant air. The solution has the advantage of not requiring power > supplies and the components are pretty cheap. > > Keeping critters out is good too. I have heard people on the > list grump about spiders who like to build their webs using the seismo > boom as an anchor point. > > IMHO, I would get a cover material that is moderately stiff. If you were to > suddenly close the door of the room where the seismo is located, there will > be a small impulse air pressure change in the room depending on the size of > the room and the presence of any other openings. A flimsy cover might move > enough to generate a small amount of vibration. I use 1/4" masonite which > seems to work reasonably well. When I open the door, I can see a very small > amount of noise on the trace, but to tell you the truth, I am not sure if it > is due to air pressure or vibration transmitted through the concrete floor. > > Ron Westfall > > > When building a cover for my Lehman what considerations should I take into > > account? Obviously air currents are the main thing I'm trying to cut out, > > but what about temperature and critters? The seismo is located inside a > > windowless room that is kept at a constant temperature year-round. I'm also > > hoping to use plexiglass, glass, or anything that I can see through. Is the > > thickness of the material used very crucial? Does anyone have any > > pre-construction tips or pointers that would be helpful? > > -dan > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- --------- Avoid computer viruses -- Practice safe hex ------------- * * Specializing in small, cost effective embedded control systems * * Robert L. (Bob) Smith Smith Machine Works, Inc. internet bobsmith5@.............. Lumlay Road landline 804/745-1065 Richmond, Virginia 23236+1004 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: Cover for seismo From: "Ron Westfall" westfall@........ Date: Tue, 10 Jul 2001 17:19:27 -0700 Oops. Sorry for the misinformation. I don't have a scope, so I never see the difference between peak voltage and RMS voltage. Ron > There seems to be a bit of a misunderstanding here. Domestic mains > power (the wall outlet kind) be it 110V AC, 117V AC, 120V AC (the most > common modern standard) or whatever your local system provides is the > voltage rating in R.M.S. (Root Mean Square) voltage. Without getting > into a short course in electrical engineering, RMS voltage is the > equivalent of an equal DC voltage in terms of heating power. > The peak voltage of the sinewave is the square root of two times the > RMS. For 115V AC mains this is about 163 Volts peak or 325 Volts peak > to peak. Just hang a good o'scope on the line to verify this. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Lehman ?? From: "Ted Rogers" TedR@.................. Date: Wed, 11 Jul 2001 11:19:34 +1000 All On a recent visit to the UK I spent a day in the Science Museum in = London, Just before I left I came across a working seismograph. It was = completely enclosed but with only glass on two sides. There was a couple = of interesting things about it, first, the boom/arm was at waist = height which meant that instead of a large drum the paper passed around = a smaller drum of say 23cm (~9") dia by 45cm (18") long down to a = smaller drive roller at floor level, giving a paper belt of about 150cm = (5'). The inking device appeared to be a capillary tube that started = horizontally, looped upwards and come down vertically to the paper = drawing a very fine line. Starting from the centre of the paper was = another stylus which appeared to be recording the time. The whole paper = belt would appear to move laterally for half the paper with. The other = interesting point was the way the mass was used, this was hung about = half way along the arm, I say hung as it was about 30cm (12") below the = arm and consisted of a number of disks about 23cm (9") dia and 2cm = (.75") thick. There was also a complicated mechanism between the end of = the arm and the stylus, time did not allow me time to work out what did = but it obviously had a use. The question I ask is why hang the mass half way along and below the = beam? Is it to magnify the amount the weight apparently moves??? Any answers - somebody must know... Ted=20
All
 
On a recent visit to the UK I spent a = day in the=20 Science Museum in London, Just before I left I came across a working=20 seismograph. It was completely enclosed but with only glass on two = sides. There=20 was a couple of  interesting things about it, first, the =  boom/arm was=20 at waist height which meant that instead of a large drum the paper = passed around=20 a smaller drum of say 23cm (~9") dia by 45cm (18") long down to a = smaller drive=20 roller at floor level, giving a paper belt of about 150cm (5'). The = inking=20 device appeared to be a capillary tube that started horizontally, looped = upwards=20 and come down vertically to the paper drawing a very fine line. Starting = from=20 the centre of the paper was another stylus which appeared to be = recording the=20 time. The whole paper belt would appear to move laterally for half the = paper=20 with. The other interesting point was the way the mass was used, this = was hung=20 about half way along the arm, I say hung as it was about 30cm (12") = below the=20 arm and consisted of a number of disks about 23cm (9") dia and 2cm = (.75") thick.=20 There was also a complicated mechanism between the end of the arm and = the=20 stylus, time did not allow me time to work out what did but it obviously = had a=20 use.
 
The question I ask is why hang the mass = half way=20 along and below the beam? Is it to magnify the amount the weight = apparently=20 moves???
 
Any answers - somebody must = know...
 
 
Ted
 
 
      <tedr@..................>
 
 
Subject: Re: Cover for seismo From: Rick Bitto rbitto@........... Date: Tue, 10 Jul 2001 22:16:27 -0400 115 Volts is the RMS (root mean squared) value of the sine wave.  The actual peak value for a pure sine wave is the product of the square root of two times the RMS value (i.e. 1.414 x 115V = 163V).  The correct voltage to use to calculate resistive power is 115V. Rick Bitto     Ron Westfall wrote: >   > >   Keep in mind that AC power is a sine wave which has > to be taken into consideration when calculating power consumption i.e 115V is > the peak voltage, not the average voltage. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: "bobshannon.org" earth@........... Date: Tue, 10 Jul 2001 20:15:44 -0700 Over the past few months I realized that there is no such thing as an "easy question" on this group and I say that with a smile..... > 115 Volts is the RMS (root mean squared) value of the sine wave. The actual peak > value for a pure sine wave is the product of the square root of two times the RMS > value (i.e. 1.414 x 115V = 163V). The correct voltage to use to calculate > resistive power is 115V. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: barry lotz gbl@....... Date: Mon, 09 Jul 2001 17:43:37 -0700 Dan I also used plexiglas for my lehman. I have it situated on a concrete slab so I was collecting moisture thru the slab. I eliminated this by placing some visqueen under the sensor and cover. I don't have a problem with temperature and the lehman. For creatures my thought was to put soft 1/2" wide foam stripping under the perimeter edge of the cover (sticky on one side) . The weight of the cover seems to seal the minor surface irregularities of the slab and hopefully preventing the entry of insects. I do have a big problem with the horizontal force balance and the vertical smt-8 style sensors wrt temperature and air currents. I think this is because the lower frequencies of the signal are amplified to correct for the drop off of the sensor. I have the best luck with air gradients by keeping the temperature as constant as possible with heavy insulation.This is also needed for the temperature affects on the leaf spring. I have the smt8 in a tightly fitting home-made aluminum box. Outside this box is ~3" of air then 1" thick foam followed by 3-4" of batt insulation and another 1" of foam. Makes the needed sensor space a little large though. One of these days I'll have an underground vault where I can keep the sensors and plenty of wine :) Regards Barry dan stevens wrote: > When building a cover for my Lehman what considerations should I take into > account? Obviously air currents are the main thing I'm trying to cut out, > but what about temperature and critters? The seismo is located inside a > windowless room that is kept at a constant temperature year-round. I'm also > hoping to use plexiglass, glass, or anything that I can see through. Is the > thickness of the material used very crucial? Does anyone have any > pre-construction tips or pointers that would be helpful? > -dan __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: ian ian@........... Date: Tue, 10 Jul 2001 18:06:55 -1000 I'm a little confused about how heating the top of the cover works. Won't this just create an inversion layer at the top of the enclosure? Ie, instead of the convection currents going all the way to the top and turning around, the currents will turn around when they meet the heated layer, perhaps an inch or two from the top. Has any measurable reduction in noise been noticed between the heaters being on and off? __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: CapAAVSO@....... Date: Wed, 11 Jul 2001 08:16:02 EDT In a message dated 7/10/01 11:53:51 PM GMT Daylight Time, dlstevens69@........... writes: << Thanks for the building tips. The store where I get the best price on plexiglass has many different sizes - anywhere from 2mm and up. Is there any advantage to using a thicker pane, such as 1/4" vs 1/8", or could I go as thin as say 5mm? >> Hello Dan, I should have mentioned that I only covered the pendulum itself and 2 mm was the thinnest Home Depot carried and it was plenty thick enough. It is important to only cover the pendulum because this gives you access to the leveling screws so you can tweak up the period to say ~20 seconds. If you have to remove a big box every time you want to tweak up the period it will drive you crazy. Furthermore, making the cover out of Plexiglas allows you to see the pendulum and center it as you adjust the leveling screws to adjust its period Here's how to make a box that covers only the pendulum: 1) cut two sides and one end for a rectangular box that will cover the pendulum inside the leveling screws. Glue the three pieces at two corners and slide this around the pendulum from the front (the mass end). The box should extend back beyond the lower pivot point so it meets the other end of the box which is fastened to the back of pendulum's frame. The three sides will not be fastened to the back end, just pushed up against it. Now you have four sides of the box in place. 2) make the top of the box in two pieces and wide enough so you can glue a piece of the 1/4 X 1/4 Balsa wood on either side of both pieces to overlap the sides and hold the two top pieces in place like a lid. The back piece of the top should extend out from the back end of the box to almost reach the pendulum support cable. The other piece of the top should have a slot about 1 cm wide cut in it to clear the support cable and cover the rest of the top of the box. Now you have a removable rectangular box that adequately protects the pendulum from drafts but yet allows access to the leveling screws so you can adjust the period while watching the pendulum to get it centered where you want it. The back end of the box is fastened to the back of the pendulum frame, the other three sides slide up against the back end from the front (the mass end) and the two piece lid sets on top with a slot to clear the support cable. All very nice, and you can show it to your friends without disturbing it by removing a big box that covers the whole business. Have fun and enjoy, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Cover for seismo From: ChrisAtUpw@....... Date: Wed, 11 Jul 2001 10:13:10 EDT In a message dated 10/07/01, dlstevens69@........... writes: > When building a cover for my Lehman what considerations should I take into > account? Obviously air currents are the main thing I'm trying to cut out, > but what about temperature and critters? The seismo is located inside a > windowless room that is kept at a constant temperature year-round. I'm also > hoping to use plexiglass, glass, or anything that I can see through. Is the > Dear Dan, There is no unique solution. Horizontal seis are less sensitive than vertical ones. Since the room is dark, having lights inside a transparent enclosure is likely to attract bugs. How constant is your 'constant temperature'? Does the temperature control switch off at any time? Do you have a min/max thermometer? The usual thinking is that the ground naturally provides the most stable temperature, so you put a well insulated rigid box over the seismometer and put a small heater in the top to maintain a reasonably constant vertical temperature gradient. This also provides some control over condensation. You can get rigid sheet foam with Al foil surfaces from building suppliers up to 3" thick, celotex?, which can be cut up using a fine wood saw and stuck together using polyurethane spray can foam. Gaffer tape will provide protection for the corners / edges. 2 mm Plexiglas is OK for the double windows, but check that it is clean before you stick it on. Polyurethane mastic sticks this well, epoxy does not. You may need to be able to 'semi seal' the box to the ground. A heater method which has not been mentioned is to use a sheet of Al inside the top of the box and stick some of the square section wire wound power resistors onto the topside with epoxy. The wiring and connections are then protected. My personal preference is to use a small transformer with tappings maybe up to 24 V, rather than having mains voltages anywhere near damp conditions. A block of camphor inside the case can be a reasonable insect deterrent. Shell Vapona flystrip is very effective. For lighting, gas discharge striplights generate much less heat than tungsten bulbs. You may want to provide a hex socket screw driver with an extended rod through the wall to be able to adjust the level without removing the box. See past PSN letters for lengthy discussions on enclosures! Regards, Chris Chapman In a message dated 10/07/01, dlstevens69@........... writes:

When b uilding a cover for my Lehman what considerations should I take into
account? Obviously air currents are the main thing I'm trying to cut out,
but what about temperature and critters? The seismo is located inside a
windowless room that is kept at a constant temperature year-round. I'm also
hoping to use plexiglass, glass, or anything that I can see through. Is the
thickness of the material used very crucial?


Dear Dan,

      There is no unique solution. Horizontal seis are less sensitive than
vertical ones. Since the room is dark, having lights inside a transparent
enclosure is likely to attract bugs. How constant is your 'constant
temperature'? Does the temperature control switch off at any time? Do you
have a min/max thermometer? The usual thinking is that the ground naturally
provides the most stable temperature, so you put a well insulated rigid box
over the seismometer and put a small heater in the top to maintain a
reasonably constant vertical temperature gradient. This also provides some
control over condensation. You can get rigid sheet foam with Al foil surfaces
from building suppliers up to 3" thick, celotex?, which can be cut up using a
fine wood saw and stuck together using polyurethane spray can foam. Gaffer
tape will provide protection for the corners / edges. 2 mm Plexiglas is OK
for the double windows, but check that it is clean before you stick it on.
Polyurethane mastic sticks this well, epoxy does not. You may need to be able
to 'semi seal' the box to the ground. A heater method which has not been
mentioned is to use a sheet of Al inside the top of the box and stick some of
the square section wire wound power resistors onto the topside with epoxy.
The wiring and connections are then protected. My personal preference is to
use a small transformer with tappings maybe up to 24 V, rather than having
mains voltages anywhere near damp conditions. A block of camphor inside the
case can be a reasonable insect deterrent. Shell Vapona flystrip is very
effective. For lighting, gas discharge striplights generate much less heat
than tungsten bulbs. You may want to provide a hex socket screw driver with
an extended rod through the wall to be able to adjust the level without
removing the box. See past PSN letters for lengthy discussions on enclosures!

      Regards,

      Chris Chapman     

Subject: Re: Cover for seismo From: Karl Cunningham karlc@.......... Date: Wed, 11 Jul 2001 10:02:07 -0700 Ian -- I believe the theory of heating at the top is to achieve an uninterrupted gradient from the top to the bottom of the enclosure. (Naturally, this cannot ever totally be achieved but one can come close. There will necessarily be convection currents in the vicinity of the heater but hopefully confined to that area.) If the gradient can be maintained at all times, there should be minimal convection currents since there is never air of lower density below air of higher density (which would want to make the air change places via convection). A requirement is that any outside heat flowing into the box below the heater be at a low enough rate that the gradient is never reversed (never gets to a point of having cooler air above warmer). Similarly, heat flowing out of the box near the top must be slow enough to prevent reversing the gradient. This requires insulation good enough to keep the heat flow below this level, which dictates thick pieces of good insulating qualities on all sides of the enclosure. This probably precludes plexiglass without insulation, although the lower the maximum rate of temperature change in the room, the less insulation is required. Another goal is to keep any heat-dissipating electronic components either outside the box or located at the top near the heater. In my force-balance seismometer box, I have about 1-1/2" foam insulation on all sides of the inside of a 1/2" plywood box. At the top are two resistors that dissipate about 2 watts total. I've never tried it without the resistors in place. Karl --On Tuesday, July 10, 2001 6:06 PM -1000 ian wrote: > I'm a little confused about how heating the top of the cover works. > Won't this just create an inversion layer at the top of the enclosure? > Ie, instead of the convection currents going all the way to the top and > turning around, the currents will turn around when they meet the heated > layer, perhaps an inch or two from the top. > > Has any measurable reduction in noise been noticed between the heaters > being on and off? __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Lehman?? From: "Ted Rogers" tedr@.................. Date: Thu, 12 Jul 2001 09:19:42 +1000 Hi On a recent visit (about 3 months ago) to the UK I spent a part of a day = in the Science Museum in London. Just before I left I came across a = working seismograph. It was completely enclosed but with only glass on = two sides. There was a couple of interesting things about it, first, = the boom/arm was about waist height which meant that instead of a large = drum the paper passed around a smaller drum of say 23cm (~9") dia by = 45cm (18") long down to a smaller drive roller at floor level, giving a = paper belt of about 150cm (5'). The inking device appeared to be a = capillary tube that started horizontally, looped upwards and come down = vertically to the paper drawing a very fine line. Starting from the = centre of the paper was another stylus which appeared to be recording = the time. The whole paper belt would appear to move laterally for half = the paper with. The other interesting point was the way the mass was = used, this was hung about half way along the arm, I say hung as it was = about 30cm (12") below the arm and consisted of a number of disks about = 23cm (9") dia and 2cm (.75") thick. There was also a complicated = mechanism between the end of the arm and the stylus, time did not allow = me time to work out what did but it obviously had a use. The question I ask is: was it a Lehman and if so why hang the mass half = way along and below the beam? Is it to magnify the amount the weight = apparently moves??? And how were the oscillations damped, if indeed they = were. Any answers - somebody must know... Ted
 
Hi
 
On a recent visit (about 3 months = ago) to the=20 UK I spent a part of a day in the Science Museum in London. Just before I left I came across a working = seismograph. It was=20 completely enclosed but with only glass on two sides. There was a couple = of  interesting things about it, first, the  boom/arm was = about waist=20 height which meant that instead of a large drum the paper passed around = a=20 smaller drum of say 23cm (~9") dia by 45cm (18") long down to a smaller = drive=20 roller at floor level, giving a paper belt of about 150cm (5'). The = inking=20 device appeared to be a capillary tube that started horizontally, looped = upwards=20 and come down vertically to the paper drawing a very fine line. Starting = from=20 the centre of the paper was another stylus which appeared to be = recording the=20 time. The whole paper belt would appear to move laterally for half the = paper=20 with. The other interesting point was the way the mass was used, this = was hung=20 about half way along the arm, I say hung as it was about 30cm (12") = below the=20 arm and consisted of a number of disks about 23cm (9") dia and 2cm = (.75") thick.=20 There was also a complicated mechanism between the end of the arm and = the=20 stylus, time did not allow me time to work out what did but it obviously = had a=20 use.
 
The question I ask is: was = it a Lehman=20 and if so why hang the mass half way along and below the beam? Is = it to=20 magnify the amount the weight apparently moves??? And how were the = oscillations=20 damped, if indeed they were.
 
Any answers - somebody must = know...
 

Ted

      <tedr@..................>
 
 Subject: Re: Lehman?? From: ChrisAtUpw@....... Date: Wed, 11 Jul 2001 22:23:08 EDT Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to visit it in the next two months, if that is any help. Regards, Chris Chapman Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to
visit it in the next two months, if that is any help.

      Regards,

      Chris Chapman Subject: Fw: Long file names From: "Larry Cochrane" cochrane@.............. Date: Wed, 11 Jul 2001 19:31:58 -0700 All, I got this input from Larry Conklin regarding long file names. Arie has a web page that describes the three letter component code name. Here's the link http://members.iinet.net.au/~ajbv/AutoDRM/Example/Alaska.html. It's part of this AutoDRM documentation. As far as station/sensor ID there is no standard. It just needs to be unique so if you send in an event file to my system it won't overwrite an existing file. Since SDR and EMON are DOS programs, the ID string was limited to 3 characters. As 32 bit dataloggers come online this could be any length. Since the sensor ID should be the same as the Sensor Name defined in the PSN 4 format it will be limited to 6 characters. If anyone has comments about lone file names please send to the list and not just to me. Thanks. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "Larry Conklin" To: "Larry Cochrane" Sent: Tuesday, July 10, 2001 12:43 PM Subject: Long file names > Larry > > I am more or less neutral on the question of using long file names to convey > more discriptive information about PSN4 files, but I do think that defining > a unique file extension to denote PSN4 files and allow Windows to make file > associations with Winquake would be a very good idea. > > Regarding the component type field in your proposed file name format, > evidently there is an established convention for the three letter code, but > I have'nt run across a source that explains how the codes are defined. Can > you point me to a source? > > Also, are there any existing conventions or restrictions on the sensor ID > that should be followed to ensure compatability with the rest of the PSN > community? > > Larry Conklin > lconklin@............ > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: More on long file names From: "Larry Cochrane" cochrane@.............. Date: Wed, 11 Jul 2001 20:20:00 -0700 All, I got this from Angel today. He is having problems posting to the list do to his ISP being placed on one of the spam prevention blacklists I am using. Right now I am forwarding anything I get regarding the long file names. I will send out my .02 in a few days. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "angel@volcanbaru" To: "Larry Cochrane" Sent: Tuesday, July 10, 2001 8:17 PM Subject: from angel > Hello Larry, > > You might get this message more than once, I'm having trouble > getting through. > > Monday, July 09, 2001, 10:00:48 PM, you wrote: > > LC> I do want to get some feedback from other members on long > LC> file name standard for the PSN event files. > > here is my 2 cents > > yyyy-mm-dd-hhmm-ss.stationname-typeandorientation > > > 2001-07-10-1230-30.BRU2-bbz > > or > > 2001-07-10-1230-30.BRU2-sz > > or > > 2001-07-10-1230-30.SCD2-az > > I think that the dashes make the date and time easy to see. I would > like to see the station name since I have several stations and the > data eventually all comes to my home and the type and orientations is > because at most stations I have three components and at some I have > more. > > So with an name like the one above I can easily pick out what station > and what device and orientation a file is from. > > regards to all, > > angel > > PS, I get the message below when I try to write to the list from my > chiriqui.com ISP > > ----- Transcript of session follows ----- > ... while talking to mail1.webtronics.com.: > >>> MAIL From: SIZE=1564 > <<< 550 5.7.1 This system is configured to > reject mail from 200.46.20.3 (Host > blacklisted - see http://maps.vix.com/rbl/) > 554 ... Service > unavailable > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format and long file names. From: "Larry Cochrane" cochrane@.............. Date: Wed, 11 Jul 2001 20:53:49 -0700 Karl, From: "Karl Cunningham" To: Sent: Monday, July 09, 2001 10:45 PM Subject: Re: PSN file format and long file names. > Larry -- > > I like the idea of having one filename extension associated with > PSN4-format files. The present method of using a different three-character > extension for each sensor makes handling these extensions using the usual > Windows file type associations almost impossible. I agree, it is almost impossible to set up a file association using the current format. I was thinking that any PSN binary formatted file could end in PSN. It's up to the program to read the file in properly. > > From SDR's point of view, if people are running SDR from a Windows 95 or 98 > machine booted to dos, doesn't that arrangement support long file names? I'm not sure how one would do this. I think the VC 16 bit compiler and runtime library I am using would not allow me to create or open a file that is not in the 8.3 format. I must admit I haven't tried it, but I'm pretty sure it wouldn't work. > > I believe naming files according to a system used by other organizations is > desireable. I think there may come a time when data is shared between > networks much more than it is now. Good point.... More later.... -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Lehman?? From: CapAAVSO@....... Date: Thu, 12 Jul 2001 08:32:47 EDT In a message dated 7/12/01 12:27:44 AM GMT Daylight Time, tedr@.................. writes: << There was also a complicated mechanism between the end of the arm and the stylus, time did not allow me time to work out what did but it obviously had a use. The question I ask is: was it a Lehman and if so why hang the mass half way along and below the beam? Is it to magnify the amount the weight apparently moves??? And how were the oscillations damped, if indeed they were. >> Hello Ted, My first seismograph recorded with pen and ink on paper. I consider this now obsolete recording method much more satisfying than writing with an electron beam on a computer monitor, which I now do. I am therefore very interested in the museum's ink on paper seismograph and here are my best guesses as to how it works: 1) No, I don't think it's a Lehman. What you see as a Lehman boom is probably a support arm for a 12-inch long hanging-mass pendulum swinging from half way out on the support arm. 2) You describe what looked like: "a complicated mechanism between the end of the arm and the stylus". My guesss is this is a mechanical amplifier, a system of levers that causes the pen to move much farther than the amount the Earth moves in relation to the suspended mass, when the device records an earthquake. 3) A careful designer could design such a system of levers to give perhaps anywhere from 20 to 50 X magnification of actual Earth movement due to an earthquake. With such a mechanical advantage the pen itself sliding on the paper would probably provide sufficient damping. In a later posting, Chris Chapman says: "I live 50 miles away, but I plan to visit it in the next two months, if that is any help." I hope Chris will take a camera along and talk nice to the museum director so he will be allowed to take some close-up pictures of the "complicated mechanism" so we can figure out what it does and how it does it. Best regards, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format and long file names. From: Karl Cunningham karlc@.......... Date: Thu, 12 Jul 2001 11:19:35 -0700 --On Wednesday, July 11, 2001 8:53 PM -0700 Larry Cochrane wrote: > Karl, > > From: "Karl Cunningham" > To: > Sent: Monday, July 09, 2001 10:45 PM > Subject: Re: PSN file format and long file names. > > I'm not sure how one would do this. I think the VC 16 bit compiler and > runtime library I am using would not allow me to create or open a file > that is not in the 8.3 format. I must admit I haven't tried it, but I'm > pretty sure it wouldn't work. This probably is getting carried away too far, but I remember reading somewhere about how windows stores long filenames in a previously unused part of the file header (my memory is hazy about this). You could concievably store the file with an 8.3 name according to some naming algorithm, then your program could modify the file header using the same format windows does to store the long filename. Of course, this probably varies between FAT16, FAT32, etc. filesystems. Just a thought. Karl __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Lehman?? From: ACole65464@....... Date: Thu, 12 Jul 2001 21:44:34 EDT In a message dated 07/12/2001 2:29:31 AM !!!First Boot!!!, ChrisAtUpw@....... writes: << Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to visit it in the next two months, if that is any help. Regards, Chris Chapman Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to visit it in the next two months, if that is any help. Regards, Chris Chapman >> Ted, I just scanned a small photograph out of an old catalog tilted "Geophysics & Geomagnetism", published by the Science Museum. The photo matches closely the instrument that you described in words. I picked a the copy of the catalog when I was visiting London 10-12 years ago. Go to the following Web page to see the scanned image (370K jpeg): http://hometown.aol.com/acole65464/SEISMOPICS.html Is this is the seismograph you saw? Regards, Allan Coleman __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Lehman?? From: "Ted Rogers" tedr@.................. Date: Fri, 13 Jul 2001 20:13:23 +1000 Allen The present seismograph at Science Museum is of the same general layout and so must be a later model of the Milne-Shaw design. The main differences as I remember were: Only a approx. a quarter of the amount weights are now being used, the paper was the full width of the drum, stylus design as previously noted, the boom seemed to be a bit longer - can't be sure and definitely no descriptive card. Other than that it was generally the same and beautifully made in brass. I can see from your photo that the mechanism at the end of the boom would certainly magnify any movement. Also I can't say whether or not it had the same heavy cast iron base. Thanks greatly for photo it certainly scanned well. ------------ Regards Ted Rogers. > ----- Original Message ----- > From: > To: > Sent: Friday, July 13, 2001 11:44 AM > Subject: Re: Lehman?? > > > > In a message dated 07/12/2001 2:29:31 AM !!!First Boot!!!, > ChrisAtUpw@....... > > writes: > > > > << Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan > to > > visit it in the next two months, if that is any help. > > > > Regards, > > > > Chris Chapman > > > > > > Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to > > > > visit it in the next two months, if that is any help. > > > > Regards, > > > > Chris Chapman > > >> > > > > Ted, > > > > I just scanned a small photograph out of an old catalog tilted "Geophysics > & > > Geomagnetism", published by the Science Museum. The photo matches closely > the > > instrument that you described in words. I picked a the copy of the catalog > > when I was visiting London 10-12 years ago. Go to the following Web page > to > > see the scanned image (370K jpeg): > > > > http://hometown.aol.com/acole65464/SEISMOPICS.html > > > > Is this is the seismograph you saw? > > > > Regards, > > > > Allan Coleman > > > > > > > > __________________________________________________________ > > > > Public Seismic Network Mailing List (PSN-L) > > > > To leave this list email PSN-L-REQUEST@.............. with > > the body of the message (first line only): unsubscribe > > See http://www.seismicnet.com/maillist.html for more information. > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Lehman?? From: CapAAVSO@....... Date: Fri, 13 Jul 2001 09:15:38 EDT In a message dated 7/13/01 2:50:44 AM GMT Daylight Time, ACole65464@....... writes: << I just scanned a small photograph out of an old catalog tilted "Geophysics & Geomagnetism", published by the Science Museum. The photo matches closely the instrument that you described in words. I picked a the copy of the catalog when I was visiting London 10-12 years ago. Go to the following Web page to see the scanned image (370K jpeg): http://hometown.aol.com/acole65464/SEISMOPICS.html >> Thanks Allan, Your very nice scanned image shows that it is a Lehman-type horizontal seismometer. The boom apparently extends back to a pivot point out of the picture with the mass supported by the turnbucle/cable going up at an angle. With the obviously very heavy mass stacked right up to the boom it would act like a Lehman seismometer. the photo shows two pins to restrain horizontal movement of the boom which extends into the complicated mechanism Ted describes. The mechanism looks like a system of compound levers that are a mechanical amplifier. I would guess that the nearest pen is amplified the least and records strong movement. What looks like two additional lever systems for the farthest pen probably amplify its movement additionally to show more detail in the seismogram. The pens and lever systems would provide drag that amounts to damping. Presumably the loop of paper runs for 24 hours so time could be measured from the start where the time of start would be marked on the paper loop. It is certainly an interesting mechanical device that could record earthquakes. Its sensitivity would depend on the lever system. The photograph shows what seems to be a carefully built and well designed system of levers that provide mechanical amplification. I hope Chris Chapman, who is an engineer, will figure out the amplification factor when he visits the museum in a couple of months. Best regards, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Lehman?? From: MicroSpun@....... Date: Fri, 13 Jul 2001 11:18:57 EDT In a message dated 7/13/01 6:21:42 AM Pacific Daylight Time, CapAAVSO@....... writes: > Subj: Re: Lehman?? > Date: 7/13/01 6:21:42 AM Pacific Daylight Time > From: CapAAVSO@....... > Sender: psn-l-request@.............. > Reply-to: psn-l@.............. > To: psn-l@.............. > > > > > In a message dated 7/13/01 2:50:44 AM GMT Daylight Time, ACole65464@....... > writes: > > << I just scanned a small photograph out of an old catalog tilted > "Geophysics > & > Geomagnetism", published by the Science Museum. The photo matches closely > the > instrument that you described in words. I picked a the copy of the catalog > when I was visiting London 10-12 years ago. Go to the following Web page to > see the scanned image (370K jpeg): > > http://hometown.aol.com/acole65464/SEISMOPICS.html >> > > Thanks Allan, > > Your very nice scanned image shows that it is a Lehman-type horizontal > seismometer. The boom apparently extends back to a pivot point out of the > picture with the mass supported by the turnbucle/cable going up at an > angle. > With the obviously very heavy mass stacked right up to the boom it would > act > like a Lehman seismometer. the photo shows two pins to restrain horizontal > movement of the boom which extends into the complicated mechanism Ted > describes. The mechanism looks like a system of compound levers that are a > mechanical amplifier. I would guess that the nearest pen is amplified the > least and records strong movement. What looks like two additional lever > systems for the farthest pen probably amplify its movement additionally to > show more detail in the seismogram. The pens and lever systems would > provide > drag that amounts to damping. Presumably the loop of paper runs for 24 > hours > so time could be measured from the start where the time of start would be > marked on the paper loop. It is certainly an interesting mechanical device > that could record earthquakes. Its sensitivity would depend on the lever > system. The photograph shows what seems to be a carefully built and well > designed system of levers that provide mechanical amplification. I hope > Chris > Chapman, who is an engineer, will figure out the amplification factor when > he > visits the museum in a couple of months. > > Best regards, > Cap > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > > > ----------------------- Headers -------------------------------- > Return-Path: > Received: from rly-zd05.mx.aol.com (rly-zd05.mail.aol.com [172.31.33.229]) > by air-zd05.mail.aol.com (v79.27) with ESMTP id MAILINZD55-0713092142; Fri, > 13 Jul 2001 09:21:42 -0400 > Received: from sys5.webtronics.com (sys5.webtronics.com [216.100.224.130]) > by rly-zd05.mx.aol.com (v79.20) with ESMTP id MAILRELAYINZD56-0713092126; > Fri, 13 Jul 2001 09:21:26 -0400 > Received: from imo-r08.mx.aol.com (unverified [152.163.225.104]) by > sys5.webtronics.com > (Rockliffe SMTPRA 4.5.4) with ESMTP id > for ; > Fri, 13 Jul 2001 06:16:52 -0700 > Received: from CapAAVSO@....... > by imo-r08.mx.aol.com (mail_out_v31.7.) id x.d8.8f4e1ef (3968) > for ; Fri, 13 Jul 2001 09:15:38 -0400 (EDT) > From: CapAAVSO@....... > Message-ID: > Date: Fri, 13 Jul 2001 09:15:38 EDT > Subject: Re: Lehman?? > To: psn-l@.............. > MIME-Version: 1.0 > Content-Type: text/plain; charset="US-ASCII" > Content-Transfer-Encoding: 7bit > X-Mailer: AOL 4.0 for Windows 95 sub 114 > Reply-To: psn-l@.............. > Sender: psn-l-request@.............. > who are you, why do you converse with someone else in my screen name? In a message dated 7/13/01 6:21:42 AM Pacific Daylight Time, CapAAVSO@.......
writes:


Subj: Re: Lehman??
Date: 7/13/01 6:21:42 AM Pacific Daylight Time
From:    CapAAVSO@.......
Sender:    psn-l-request@..............
Reply-to: psn-l@..............
To:    psn-l@..............




In a message dated 7/13/01 2:50:44 AM GMT Daylight Time, ACole65464@.......
writes:

<< I just scanned a small photograph out of an old catalog tilted
"Geophysics
&
Geomagnetism", published by the Science Museum. The photo matches closely
the
instrument that you described in words. I picked a the copy of the catalog
when I was visiting London 10-12 years ago. Go to the following Web page to
see the scanned image (370K jpeg):

http://hometown.aol.com/acole65464/SEISMOPICS.html >>

Thanks Allan,

Your very nice scanned image shows that it is a Lehman-type horizontal
seismometer. The boom apparently extends back to a pivot point out of the
picture with the mass supported by the turnbucle/cable going up at an
angle.
With the obviously very heavy mass stacked right up to the boom it would
act
like a Lehman seismometer. the photo shows two pins to restrain horizontal
movement of the boom which extends into the complicated mechanism Ted
describes. The mechanism looks like a system of compound levers that are a
mechanical amplifier. I would guess that the nearest pen is amplified the
least and records strong movement. What looks like two additional lever
systems for the farthest pen probably amplify its movement additionally to
show more detail in the seismogram. The pens and lever systems would
provide
drag that amounts to damping. Presumably the loop of paper runs for 24
hours
so time could be measured from the start where the time of start would be
marked on the paper loop. It is certainly an interesting mechanical device
that could record earthquakes. Its sensitivity would depend on the lever
system. The photograph shows what seems to be a carefully built and well
designed system of levers that provide mechanical amplification. I hope
Chris
Chapman, who is an engineer, will figure out the amplification factor when
he
visits the museum in a couple of months.

Best regards,
Cap
__________________________________________________________

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the body of the message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more information.


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Date: Fri, 13 Jul 2001 09:15:38 EDT
Subject: Re: Lehman??
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who are you, why do you converse with someone else in my screen name? Subject: Re: Lehman?? unsubscribe me please!!!!!!!!!!!!1 From: MicroSpun@....... Date: Fri, 13 Jul 2001 11:20:48 EDT In a message dated 7/12/01 6:50:44 PM Pacific Daylight Time, ACole65464@....... writes: > > > In a message dated 07/12/2001 2:29:31 AM !!!First Boot!!!, > ChrisAtUpw@....... > writes: > > << Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to > visit it in the next two months, if that is any help. > > Regards, > > Chris Chapman > > > Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to > > visit it in the next two months, if that is any help. > > Regards, > > Chris Chapman > >> > > Ted, > > I just scanned a small photograph out of an old catalog tilted "Geophysics & > > Geomagnetism", published by the Science Museum. The photo matches closely > the > instrument that you described in words. I picked a the copy of the catalog > when I was visiting London 10-12 years ago. Go to the following Web page to > see the scanned image (370K jpeg): > > http://hometown.aol.com/acole65464/SEISMOPICS.html > > Is this is the seismograph you saw? > > Regards, > > Allan Coleman > > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > In a message dated 7/12/01 6:50:44 PM Pacific Daylight Time,
ACole65464@....... writes:




In a message dated 07/12/2001 2:29:31 AM !!!First Boot!!!,
ChrisAtUpw@.......
writes:

<< Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to
visit it in the next two months, if that is any help.

       Regards,

       Chris Chapman


Try http://www.sciencemuseum.org.uk/ I live 50 miles away, but I plan to

visit it in the next two months, if that is any help.

       Regards,

       Chris Chapman
 >>

Ted,

I just scanned a small photograph out of an old catalog tilted "Geophysics &

Geomagnetism", published by the Science Museum. The photo matches closely
the
instrument that you described in words. I picked a the copy of the catalog
when I was visiting London 10-12 years ago. Go to the following Web page to
see the scanned image (370K jpeg):

http://hometown.aol.com/acole65464/SEISMOPICS.html

Is this is the seismograph you saw?

Regards,

Allan Coleman



__________________________________________________________

Public Seismic Network Mailing List (PSN-L)

To leave this list email PSN-L-REQUEST@.............. with
the body of the message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more information.
Subject: Ebay Auction Seismic items From: "bobodude" bobodude@............. Date: Fri, 13 Jul 2001 17:50:22 -0700 FYI There are 3 EG&E Seismic Pre-amps 022, for sale on ebay. Item # 1615045477 for $5. Roger Oakley Seismic Station __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: GPS receiver group buy, and other hardware for sale From: "Larry Cochrane" cochrane@.............. Date: Sun, 15 Jul 2001 01:17:23 -0700 All, A few weeks ago Chris Long (ChrisL@........... contacted me about buying some GPS interface boards from me. He has 20, and will be getting a total of 80, Motorola ONCORE GPS receivers and antennas. They are slightly used but in good condition. I had him send me one of each so I could test them with SDR and they work fine. They are exactly the same receiver I have been selling except these have the battery option. The antenna is similar to the one I have been selling for awhile except the wire is a lot shorter. The antenna I got from him has ~45 inch (1.1 meters) of wire and manufactured by AeroAntenna Technology. The part number is AT575-109-OCXR-48-05-12-NM. See this page http://www.aeroantenna.com/html/ordering.html for more info. The GPS antenna I have been sell has 16 feet (4.8 m) of wire, other then that, both seem to work about the same. See http://www.seismicnet.com/gps/index.html for information on the ONCORE GPS receiver and the antenna I am selling. Chris would like to sell the GPS parts in lots of ten. The units we don't buy from him will probably be placed on EBay with a starting bid of ~$45 for the receiver and $10.00 for the antenna. I plan to buy 10 or 20 for my stock and sell a complete timing system, including my interface board for around $120.00. This would be 1/2 of the current price using new GPS receivers and antennas. Please let me know if you are interested in one or more of the GPS receivers and / or antennas, or a complete time system including my interface board. Chris also has the following hardware for sale: 12v NIMH battery packs. Come in sets of 2 3500AH packs, for a total of 12v 7000AH. I have a quantity of about 80+ of these packs. Cells are slightly bigger than AA batteries. 9.6V NIMH battery packs, with a built in charging circuit. AAA size, 8 cells total. Not sure of AH capacity, estimating 350. I also have a James special charger and charging circuit for both packs, that allows someone to integrate the batteries into a project easily. Octagon Systems 6024 MicroPC SBC CPU module, 8088 XT, 1 MB memory, can accept PLCC flash memory and 28 pin DIP flash to allow a grand total of 1 MB of disk space, LPT, 2 COM, KB/SPKR, ISA bus, and 24 Digital I/O ports. These actually run DOS and files can be transferred back and forth via a serial console. Air Communications Aircommunicator, combines an Ericsson AMPS cell phone and a 14.4k modem. These are units without cases designed to be embedded into a project. Even without a display or keypad, the units are remotely controllable via a serial port. Please contact Chris Long (ChrisL@........... for any of the items above. -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS receiver group buy, and other hardware for sale From: CapAAVSO@....... Date: Sun, 15 Jul 2001 07:56:07 EDT In a message dated 7/15/01 9:23:05 AM GMT Daylight Time, cochrane@.............. writes: << I plan to buy 10 or 20 for my stock and sell a complete timing system, including my interface board for around $120.00. This would be 1/2 of the current price using new GPS receivers and antennas. Please let me know if you are interested in one or more of the GPS receivers and / or antennas, or a complete time system including my interface board. >> Hello Larry, Please put me down as one who would like to purchase one of Chris Long's GPS units with your Interface Board for $120. Thank you, Cap (Casper Hossfield) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS receiver group buy, and other hardware for sale From: "Bob Hancock" robert.hancock@........... Date: Sun, 15 Jul 2001 08:42:17 -0400 Larry - I would like to purchase one of the complete GPS boards @ $120. Please advise me of the details........ Thanks Bob Hancock ----- Original Message ----- From: "Larry Cochrane" To: Cc: "Chris Long" Sent: Sunday, July 15, 2001 4:17 AM Subject: GPS receiver group buy, and other hardware for sale > All, > > A few weeks ago Chris Long (ChrisL@........... contacted me about buying > some GPS interface boards from me. He has 20, and will be getting a total of > 80, Motorola ONCORE GPS receivers and antennas. They are slightly used but > in good condition. I had him send me one of each so I could test them with > SDR and they work fine. They are exactly the same receiver I have been > selling except these have the battery option. The antenna is similar to the > one I have been selling for awhile except the wire is a lot shorter. The > antenna I got from him has ~45 inch (1.1 meters) of wire and manufactured by > AeroAntenna Technology. The part number is AT575-109-OCXR-48-05-12-NM. See > this page http://www.aeroantenna.com/html/ordering.html for more info. The > GPS antenna I have been sell has 16 feet (4.8 m) of wire, other then that, > both seem to work about the same. See > http://www.seismicnet.com/gps/index.html for information on the ONCORE GPS > receiver and the antenna I am selling. > > Chris would like to sell the GPS parts in lots of ten. The units we don't > buy from him will probably be placed on EBay with a starting bid of ~$45 for > the receiver and $10.00 for the antenna. I plan to buy 10 or 20 for my stock > and sell a complete timing system, including my interface board for around > $120.00. This would be 1/2 of the current price using new GPS receivers and > antennas. > > Please let me know if you are interested in one or more of the GPS receivers > and / or antennas, or a complete time system including my interface board. > > Chris also has the following hardware for sale: > > 12v NIMH battery packs. Come in sets of 2 3500AH packs, for a total of 12v > 7000AH. I have a quantity of about 80+ of these packs. Cells are slightly > bigger than AA batteries. > > 9.6V NIMH battery packs, with a built in charging circuit. AAA size, 8 cells > total. Not sure of AH capacity, estimating 350. > > I also have a James special charger and charging circuit for both packs, > that allows someone to integrate the batteries into a project easily. > > Octagon Systems 6024 MicroPC SBC CPU module, 8088 XT, 1 MB memory, can > accept PLCC flash memory and 28 pin DIP flash to allow a grand total of 1 MB > of disk space, LPT, 2 COM, KB/SPKR, ISA bus, and 24 Digital I/O ports. These > actually run DOS and files can be transferred back and forth via a serial > console. > > Air Communications Aircommunicator, combines an Ericsson AMPS cell phone and > a 14.4k modem. These are units without cases designed to be embedded into a > project. Even without a display or keypad, the units are remotely > controllable via a serial port. > > Please contact Chris Long (ChrisL@........... for any of the items above. > > -Larry Cochrane > Redwood City, PSN > > > > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS receiver group buy, and other hardware for sale From: Karl Cunningham karlc@.......... Date: Sun, 15 Jul 2001 08:25:53 -0700 Larry -- How much would it be for the receiver and antenna without interface card? Karl --On Sunday, July 15, 2001 01:17 -0700 Larry Cochrane wrote: > A few weeks ago Chris Long (ChrisL@........... contacted me about buying > some GPS interface boards from me. He has 20, and will be getting a total > of 80, Motorola ONCORE GPS receivers and antennas. They are slightly used > but in good condition. I had him send me one of each so I could test them > with SDR and they work fine. They are exactly the same receiver I have > been selling except these have the battery option. The antenna is similar > to the one I have been selling for awhile except the wire is a lot > shorter. The antenna I got from him has ~45 inch (1.1 meters) of wire and > manufactured by AeroAntenna Technology. The part number is > AT575-109-OCXR-48-05-12-NM. See this page > http://www.aeroantenna.com/html/ordering.html for more info. The GPS > antenna I have been sell has 16 feet (4.8 m) of wire, other then that, > both seem to work about the same. See > http://www.seismicnet.com/gps/index.html for information on the ONCORE GPS > receiver and the antenna I am selling. > > Chris would like to sell the GPS parts in lots of ten. The units we don't > buy from him will probably be placed on EBay with a starting bid of ~$45 > for the receiver and $10.00 for the antenna. I plan to buy 10 or 20 for > my stock and sell a complete timing system, including my interface board > for around $120.00. This would be 1/2 of the current price using new GPS > receivers and antennas. > > Please let me know if you are interested in one or more of the GPS > receivers and / or antennas, or a complete time system including my > interface board. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: seismograph polarity From: "angel@chiriqui" angel@............ Date: Sun, 15 Jul 2001 12:24:35 -0500 Hi All, If I tap a N/S horizotal geophone from the north which way should the trace go? angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: seismograph polarity From: Karl Cunningham karlc@.......... Date: Sun, 15 Jul 2001 11:17:22 -0700 Angel -- I got the following from Edward Cranswick on July 30, 1997. Karl > Ground Motion: Down to Up, i.e., upward, is positive. > Ground Motion: South to North, i.e., towards the North, is postive. > Ground Motion: West to East, i.e., towards the East, is postive. > > The above is a convention we use here at our USGS group in Golden, CO, > that chases earthquakes. The important thing is that the motion of the > ground in one linear direction is ultimately represented by some kind of > wiggly line on paper or a screen (computer, CRT, etc.), and as long as > one knows that when the line moves up or down, the ground moves back and > forth correspondingly, then one is getting started in using one's > instrument to find out what the Earth is doing. > -Edward --On Sunday, July 15, 2001 12:24 -0500 "angel@chiriqui" wrote: > Hi All, > > If I tap a N/S horizotal geophone from the north which way should the > trace go? > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re[2]: seismograph polarity From: "angel@chiriqui" angel@............ Date: Sun, 15 Jul 2001 13:31:54 -0500 Thanks Karl, Now that I know that I have that, what would folks guess is the effect of taping a N/S geophone from the north. angel I have calibrated my geophone and I'm pretty sure that the ground moves 2.22 nanometeres for every count. Sunday, July 15, 2001, 1:17:22 PM, you wrote: KC> Angel -- KC> I got the following from Edward Cranswick on July 30, 1997. KC> Karl >> Ground Motion: Down to Up, i.e., upward, is positive. >> Ground Motion: South to North, i.e., towards the North, is postive. >> Ground Motion: West to East, i.e., towards the East, is postive. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format and long file names. From: barry lotz gbl@....... Date: Sat, 14 Jul 2001 09:40:14 -0700 Larry 2¢ I have been using an 8.3 format and haven't had any difficulty ie (YYMMDDNd.SS#) where year month and day are obvious. N: station sensor id A-Z (26 possible sensors - 36 if one uses numbers d: direction V(vertical),N(north-south),E (east west) SS:two letter/number station id #: quake # that day from that station 36 max(0-9 & A-Z). Possibly lower case letters also I can see the two number year could be a problem around 2060. If everyone in PSN had a unique two letter id (may already be the case) then being able to record more than 36 events/day/sensor would be the only drawback to this format. Regards Barry __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS receiver group buy, and other hardware for sale From: barry lotz gbl@....... Date: Sat, 14 Jul 2001 10:29:12 -0700 Larry I have been using the radio shack "atomic clock" for quite a while with SDR. What might be the advantage of the GPS clock? The price is right for the radio shack unit but maybe there is a problem with reception. Would the GPS unit be more compatable with file transfer via pcanywhere and it's interupts? Regards Barry Larry Cochrane wrote: > All, > > A few weeks ago Chris Long (ChrisL@........... contacted me about buying > some GPS interface boards from me. He has 20, and will be getting a total of > 80, Motorola ONCORE GPS receivers and antennas. They are slightly used but > in good condition. I had him send me one of each so I could test them with > SDR and they work fine. They are exactly the same receiver I have been > selling except these have the battery option. The antenna is similar to the > one I have been selling for awhile except the wire is a lot shorter. The > antenna I got from him has ~45 inch (1.1 meters) of wire and manufactured by > AeroAntenna Technology. The part number is AT575-109-OCXR-48-05-12-NM. See > this page http://www.aeroantenna.com/html/ordering.html for more info. The > GPS antenna I have been sell has 16 feet (4.8 m) of wire, other then that, > both seem to work about the same. See > http://www.seismicnet.com/gps/index.html for information on the ONCORE GPS > receiver and the antenna I am selling. > > Chris would like to sell the GPS parts in lots of ten. The units we don't > buy from him will probably be placed on EBay with a starting bid of ~$45 for > the receiver and $10.00 for the antenna. I plan to buy 10 or 20 for my stock > and sell a complete timing system, including my interface board for around > $120.00. This would be 1/2 of the current price using new GPS receivers and > antennas. > > Please let me know if you are interested in one or more of the GPS receivers > and / or antennas, or a complete time system including my interface board. > > Chris also has the following hardware for sale: > > 12v NIMH battery packs. Come in sets of 2 3500AH packs, for a total of 12v > 7000AH. I have a quantity of about 80+ of these packs. Cells are slightly > bigger than AA batteries. > > 9.6V NIMH battery packs, with a built in charging circuit. AAA size, 8 cells > total. Not sure of AH capacity, estimating 350. > > I also have a James special charger and charging circuit for both packs, > that allows someone to integrate the batteries into a project easily. > > Octagon Systems 6024 MicroPC SBC CPU module, 8088 XT, 1 MB memory, can > accept PLCC flash memory and 28 pin DIP flash to allow a grand total of 1 MB > of disk space, LPT, 2 COM, KB/SPKR, ISA bus, and 24 Digital I/O ports. These > actually run DOS and files can be transferred back and forth via a serial > console. > > Air Communications Aircommunicator, combines an Ericsson AMPS cell phone and > a 14.4k modem. These are units without cases designed to be embedded into a > project. Even without a display or keypad, the units are remotely > controllable via a serial port. > > Please contact Chris Long (ChrisL@........... for any of the items above. > > -Larry Cochrane > Redwood City, PSN > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: PSN file format and long file names From: "Larry Conklin" lconklin@............ Date: Sun, 15 Jul 2001 16:54:44 -0400 One potential drawback to long file names is that people running their data loggers on old hardware may not be able to use them. Until recently I was running my logger on a very old DOS machine that didn't know from long file names. I finally got tired of some other problems that the machine had and upgraded to a machine that is capable of running Windows, and my logger runs just fine in the Windows environment, so long file names aren't a problem for me any more. Larry Conklin lconklin@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PSN file format and long file names From: "Larry Cochrane" cochrane@.............. Date: Sun, 15 Jul 2001 16:12:04 -0700 At this point I don't think anyone is using DOS to view the event files. As I said before both EMON and SDR are DOS programs, so they will continue to produce 8.3 format event files. One does need to be careful in what characters are used for the name. As far as I know, and someone please correct me if I'm wrong, all OSs (except DOS) will except numbers, upper/lower case A-Z and one or more periods in the name. I once created some files for a person using a Mac and using a - in the name caused problems. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "Larry Conklin" To: "PSN List" Sent: Sunday, July 15, 2001 1:54 PM Subject: RE: PSN file format and long file names > One potential drawback to long file names is that people running their data > loggers on old hardware may not be able to use them. Until recently I was > running my logger on a very old DOS machine that didn't know from long file > names. I finally got tired of some other problems that the machine had and > upgraded to a machine that is capable of running Windows, and my logger runs > just fine in the Windows environment, so long file names aren't a problem > for me any more. > > Larry Conklin > lconklin@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Winquake crash - New beta release From: "Larry Cochrane" cochrane@.............. Date: Sun, 15 Jul 2001 16:21:54 -0700 Karl and PSN'ers, Thanks for the bug report Karl. I was able to fix the problem and correct the spelling error. The new beta release can be downloaded here: http://www.seismicnet.com/software.html. As always, make sure you copy all of the files in the zip file to WinQuake's root directory. Also included in the beta release is a new version of PSNExporer. I didn't change anything, just recompiled it with the new VC++ 6.0 service pack. Regards, Larry Cochrane Redwood City, PSN ----- Original Message ----- >From: "Karl Cunningham" >To: "Larry Cochrane" >Sent: Sunday, July 15, 2001 8:08 AM >Subject: Re: Winquake crash > Immediately after I hit the "Connnect" button. (BTW, the wording on the > connect button has three N's). > > I take it back about it doing it on all the listed servers. It only does > it with the following servers: > > http://quake.wr.usgs.gov/recenteqs/Quakes/quakes0.html (N. Cal Events) > http://www.scecdc.scec.org/recenteqs/Quakes/quakes0.html (Cal & Nevada) > http://www-socal.wr.usgs.gov/given/review/hyp.list (S. Cal Events) > http://quake.wr.usgs.gov/recent/weekreps/latest/index.html (Weekly N.Cal) > http://gldss7.cr.usgs.gov/neis/qed/qed.html (USGS QED) > > > Karl > > > ----- Original Message ----- > From: "Karl Cunningham" > To: > Sent: Saturday, July 14, 2001 11:02 AM > Subject: Winquake crash > > > Hi Larry -- > >In the latest Winquake (2.7b8), whenever I try to retrieve a network >report it crashes. I am using NT4 sp6a. The message NT gives is: "The >instruction at 0x00453878 referenced memory at 0x00000000. The memory > could not be read." > > This seems to happen every time I try to get a network report from any > of the listed servers. > > Karl __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Network report difficulties From: "Larry Conklin" lconklin@............ Date: Sun, 15 Jul 2001 20:04:28 -0400 A while ago there was some discussion of problems people were having connecting to the quake@................. site with Winquake. Some people weren't having any problem and others were. I haven't had any luck since the question was last raised. I wondered if anyone ever was able to explain what the problem is and whether there is a solution? Larry Conklin lconklin@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Network report difficulties From: "Larry Cochrane" cochrane@.............. Date: Sun, 15 Jul 2001 17:59:05 -0700 Larry, If you install the new beta release you can use this USGS web page http://quake.wr.usgs.gov/cgi-bin/finger?quake@................. service for event reports. This page has the same info as the finger service. -Larry ----- Original Message ----- From: "Larry Conklin" To: "PSN List" Sent: Sunday, July 15, 2001 5:04 PM Subject: Network report difficulties > A while ago there was some discussion of problems people were having > connecting to the quake@................. site with Winquake. Some people > weren't having any problem and others were. I haven't had any luck since > the question was last raised. I wondered if anyone ever was able to explain > what the problem is and whether there is a solution? > > Larry Conklin > lconklin@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS receiver group buy, and other hardware for sale From: "Larry Cochrane" cochrane@.............. Date: Sun, 15 Jul 2001 18:23:36 -0700 Karl and others, At this time I don't know what the final price will be. I realize that it's kind of a Catch 22 thing.... So far it looks like we will be getting around 30 receivers and antennas. Now that I have an idea on how many units we will be getting, I will ask Chris for a price. He may want to trade some of his units for some of my interface boards so I need to negotiate a deal with him... -Larry ----- Original Message ----- From: "Karl Cunningham" To: Sent: Sunday, July 15, 2001 8:25 AM Subject: Re: GPS receiver group buy, and other hardware for sale > Larry -- > > How much would it be for the receiver and antenna without interface card? > > Karl > > --On Sunday, July 15, 2001 01:17 -0700 Larry Cochrane > wrote: > > A few weeks ago Chris Long (ChrisL@........... contacted me about buying > > some GPS interface boards from me. He has 20, and will be getting a total > > of 80, Motorola ONCORE GPS receivers and antennas. They are slightly used > > but in good condition. I had him send me one of each so I could test them > > with SDR and they work fine. They are exactly the same receiver I have > > been selling except these have the battery option. The antenna is similar > > to the one I have been selling for awhile except the wire is a lot > > shorter. The antenna I got from him has ~45 inch (1.1 meters) of wire and > > manufactured by AeroAntenna Technology. The part number is > > AT575-109-OCXR-48-05-12-NM. See this page > > http://www.aeroantenna.com/html/ordering.html for more info. The GPS > > antenna I have been sell has 16 feet (4.8 m) of wire, other then that, > > both seem to work about the same. See > > http://www.seismicnet.com/gps/index.html for information on the ONCORE GPS > > receiver and the antenna I am selling. > > > > Chris would like to sell the GPS parts in lots of ten. The units we don't > > buy from him will probably be placed on EBay with a starting bid of ~$45 > > for the receiver and $10.00 for the antenna. I plan to buy 10 or 20 for > > my stock and sell a complete timing system, including my interface board > > for around $120.00. This would be 1/2 of the current price using new GPS > > receivers and antennas. > > > > Please let me know if you are interested in one or more of the GPS > > receivers and / or antennas, or a complete time system including my > > interface board. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS receiver group buy, and other hardware for sale From: "Larry Cochrane" cochrane@.............. Date: Sun, 15 Jul 2001 18:47:13 -0700 Barry, > Larry > I have been using the radio shack "atomic clock" for quite a while with SDR. > What might be the advantage of the GPS clock? If your existing method works well then you probably don't need the GPS system. With GPS timing one can get a few milliseconds of accuracy, with WWVB the accuracy is around +-20 ms and it can very with reception. >The price is right for the radio > shack unit but maybe there is a problem with reception. Would the GPS unit be > more compatable with file transfer via pcanywhere and it's interupts? No, with GPS SDR still uses a 1 ms (or 500 us at high SPS rates and number of channels) interrupt. If you don't have a handheld GPS receiver one can also use the receiver/interface board to do a site survey of you sensor using WinONCORE or TAC32 (http://www.cnssys.com/cnsclock/Tac32Software.html). -Larry > Regards > Barry __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Network report difficulties From: "Larry Conklin" lconklin@............ Date: Sun, 15 Jul 2001 22:10:02 -0400 Larry, Many thanks for the tip. Tried it and it works fine. Larry ----- Original Message ----- From: "Larry Cochrane" To: Sent: Sunday, July 15, 2001 8:59 PM Subject: Re: Network report difficulties > Larry, > > If you install the new beta release you can use this USGS web page > http://quake.wr.usgs.gov/cgi-bin/finger?quake@................. service for > event reports. This page has the same info as the finger service. > > -Larry > > ----- Original Message ----- > From: "Larry Conklin" > To: "PSN List" > Sent: Sunday, July 15, 2001 5:04 PM > Subject: Network report difficulties > > > > A while ago there was some discussion of problems people were having > > connecting to the quake@................. site with Winquake. Some > people > > weren't having any problem and others were. I haven't had any luck since > > the question was last raised. I wondered if anyone ever was able to > explain > > what the problem is and whether there is a solution? > > > > Larry Conklin > > lconklin@............ > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Network report difficulties From: "Randall Pratt" randallpratts@.......... Date: Sun, 15 Jul 2001 22:21:19 -0500 Hi Larry and All, Shortly after the discussion my connection started working again about 95% of the time. Unfortunately my data logger crashed several weeks later and I haven't had much need recently. I don't have any idea what caused or corrected the problem. It does seem the failures come more often during business hours so web traffic may be a factor. Randy > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Network report difficulties From: "Randall Pratt" randallpratts@.......... Date: Sun, 15 Jul 2001 22:28:38 -0500 Larry and All, Shortly ofter the discussion I was again able to get the network reports most of the time. I didn't ever discover a cause or the cure. Unfortunately, my data logger hard drive went bad and I haven't had much use lately. The connection failure does seem to come more during business hours so may be related to web traffic or routing. Randy ----- Original Message ----- From: Larry Conklin To: Sent: Sunday, July 15, 2001 9:10 PM Subject: Re: Network report difficulties > Larry, > > Many thanks for the tip. Tried it and it works fine. > > Larry > > ----- Original Message ----- > From: "Larry Cochrane" > To: > Sent: Sunday, July 15, 2001 8:59 PM > Subject: Re: Network report difficulties > > > > Larry, > > > > If you install the new beta release you can use this USGS web page > > http://quake.wr.usgs.gov/cgi-bin/finger?quake@................. service > for > > event reports. This page has the same info as the finger service. > > > > -Larry > > > > ----- Original Message ----- > > From: "Larry Conklin" > > To: "PSN List" > > Sent: Sunday, July 15, 2001 5:04 PM > > Subject: Network report difficulties > > > > > > > A while ago there was some discussion of problems people were having > > > connecting to the quake@................. site with Winquake. Some > > people > > > weren't having any problem and others were. I haven't had any luck > since > > > the question was last raised. I wondered if anyone ever was able to > > explain > > > what the problem is and whether there is a solution? > > > > > > Larry Conklin > > > lconklin@............ > > > > > > __________________________________________________________ > > > > Public Seismic Network Mailing List (PSN-L) > > > > To leave this list email PSN-L-REQUEST@.............. with > > the body of the message (first line only): unsubscribe > > See http://www.seismicnet.com/maillist.html for more information. > > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Network report difficulties From: "Nick & Sophie Caporossi" nickcap@............. Date: Mon, 16 Jul 2001 17:06:07 -0400 Hi Larry Conklin and others: The Site quake@................. Still is not connecting for me . The Since I installed the new release, Winquake27beta8 I can now use USGS web page: http://quake.wr.usgs.gov/cgi-bin/finger?quake@................. service for event reports. Nick ----- Original Message ----- From: Larry Conklin To: PSN List Sent: Sunday, July 15, 2001 8:04 PM Subject: Network report difficulties > A while ago there was some discussion of problems people were having > connecting to the quake@................. site with Winquake. Some people > weren't having any problem and others were. I haven't had any luck since > the question was last raised. I wondered if anyone ever was able to explain > what the problem is and whether there is a solution? > > Larry Conklin > lconklin@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Update on GPS timing system group buy From: "Larry Cochrane" cochrane@.............. Date: Tue, 17 Jul 2001 21:44:24 -0700 All, I can now supply firm prices for the GPS receiver, antenna and interface board options; GPS Receiver: 1 to 5 units $46.00 each, 5 to 10 units $44.00 each GPS Receiver and Antenna: 1 to 5 units $52.00, 5 to 10 units $49.00 each GPS Receiver, Antenna and Interface Board: 1 to 5 units $105.00 each, 5 to 10 units $100.00 each. On the interface board option; If you look at this page http://www.seismicnet.com/gps/index.html you will see a picture of the GPS system. Since the GPS receiver has a battery in it, there is no need for the battery holder. Also to keep the cost down the $105.00 prices does not include the power cable. If you would like me to supply the power cable please add $5.00. The Y cable I use cost $2.00 at the local Fry's Electronics store and there's also the time to build the cable.... I can also supply a wall mounted power supply (USA power plug only) at $10.00 each. Prices above do not include shipping and insurance. Within the states shipping should run around $8.00 and international air mail around $20.00. I will work with each of you on a final price. For payment methods please see this web page http://www.seismicnet.com/HowToOrder.html. You can use PayPay.com if you would like to use a credit card. Contact me for my PayPal user ID. Chris will be testing each unit before shipping them to me, and I will test them again before shipping them out to you. He said he would send them, I ordered 30 receiver and antennas from him, on Friday. I only have 5 blank interface boards left, so I ordered 50 more today. It will take ~2 weeks before I get the boards in. If you ordered a receiver / antenna only, I will send them out as soon as I receive and test them. It will take an extra week or so to get the interface PC boards and build and test them. Regards, Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Update on GPS timing system group buy From: "angel@chiriqui" angel@............ Date: Wed, 18 Jul 2001 15:36:31 -0500 Hello Larry, Thanks for the prices, I have a few questions. Can I mix and match for the above 5 prices, I want some with boards and other without? Once I have the ones with the interface board, can I set the time without using SDR. I want to set up a local time server for my network? Do you have any more of the 3 component 4.5 Hz units? thanks, Angel Tuesday, July 17, 2001, 11:44:24 PM, you wrote: LC> All, LC> I can now supply firm prices for the GPS receiver, antenna and interface LC> board options; LC> GPS Receiver: 1 to 5 units $46.00 each, 5 to 10 units $44.00 each LC> GPS Receiver and Antenna: 1 to 5 units $52.00, 5 to 10 units $49.00 each LC> GPS Receiver, Antenna and Interface Board: 1 to 5 units $105.00 each, 5 to LC> 10 units $100.00 each. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS receivers model number and connector From: "Larry Cochrane" cochrane@.............. Date: Wed, 18 Jul 2001 17:55:08 -0700 Bob, ----- Original Message ----- From: "Lewis, Bob" To: Sent: Wednesday, July 18, 2001 6:12 AM Subject: GPS receivers > Larry: > > Which Oncore receiver is this? Motorola has 4 models of the Oncore: > > M12 Oncore > SL Oncore > GT+ Oncore > UT+ Oncore It's the GT+ model. The number is R3211G1111. > > The UT+ is the one that is optimized for timing applications. The GT+ model is fine for most purposes. The UT+ accuracy is ~45 nanoseconds and the GT+ has an accuracy of ~500ns. Well below anything we would need for recording earthquakes. > > Also, do the antennas that you acquired have the correct > connector to mate with the fitting on the receiver board? > As I remember, it is a snap-on OSX connector, not something > that you can get at Radio Shack. Yes, the connector on the antenna, an OSX type, matches the one on the receiver. -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: GPS cost From: "Larry Cochrane" cochrane@.............. Date: Wed, 18 Jul 2001 18:50:33 -0700 Hi Karl, Your cost will be $50.00 + $5.00 for shipping. -Larry ----- Original Message ----- From: "Karl Cunningham" To: Sent: Sunday, July 15, 2001 8:25 AM Subject: Re: GPS receiver group buy, and other hardware for sale > Larry -- > > How much would it be for the receiver and antenna without interface card? > > Karl __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: GPS cost From: "Steve Hammond" shammon1@............. Date: Thu, 19 Jul 2001 11:02:58 -0700 Hi Larry, can you sign me up for the receiver and antenna? Thanks, Steve Hammond -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@................. Behalf Of Larry Cochrane Sent: Wednesday, July 18, 2001 6:51 PM To: psn-l@.............. Subject: GPS cost Hi Karl, Your cost will be $50.00 + $5.00 for shipping. -Larry ----- Original Message ----- From: "Karl Cunningham" To: Sent: Sunday, July 15, 2001 8:25 AM Subject: Re: GPS receiver group buy, and other hardware for sale > Larry -- > > How much would it be for the receiver and antenna without interface card? > > Karl __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: WinOncore From: "angel@chiriqui" angel@............ Date: Thu, 19 Jul 2001 15:30:58 -0500 Hello GPSers, Here is an address to download WinOncore. The windows configuration tool for the Oncore GT+. I have yet to find the DOS tool so if anyone finds it please let me know. http://www.motorola.com/ies/GPS/products/prodwo.html -- Best regards, angel mailto:angel@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: GPS group buy From: "Larry Cochrane" cochrane@.............. Date: Fri, 20 Jul 2001 19:44:59 -0700 GPS'ers I sent Chris the money using www.PayPal.com. PayPal is great, hope they don't end up like WebVan, especially with some money in my account with them....Chris said he would check out the units in the next few days and send them out 7/24 or 7/25. Once I get them I will check them out again and start sending out orders that only have receivers and antennas. Orders with interfaces boards will have to wait until I get more PC boards. This should take an extra week or so. -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: WinQuake From: "dan stevens" dlstevens69@........... Date: Mon, 23 Jul 2001 17:01:39
A quick question about WinQuake...
 
I just brought an event file from SDR to WinQuake, the quake was ~1 minute long but when I open it in WinQuake the time al ong the bottom of the screen sshows it as being ~1 hour long. However, the cursor time displays the real time as I move the cur sor around. Where did I goof up?  BTW: this is thwe first event I've picked up since switching from knife-edge boom to bal l-bearing and it's WAY more sensitive than before! -dan

Get your FREE download of MSN Explorer at http://explorer.msn.com
Subject: Hello From: "wildboar" wildboar@.............. Date: Wed, 25 Jul 2001 14:50:20 -0400 Dear Folks, I am new to this site and my knowledge of its contents is limited. The = reason I am interested is that our community lives near a mine that = blasts to recover product. The land use has changed considerably over = the last 10 years (from agricultural to = ag-residential/residential/commercial) and we are experiencing damage = due to the blasts. The "governing" authority for mines is the State Fire Marshall...and the = laws governing mining are full of loop holes at best. The immediate = problem is that the mine self-monitors their blasting activities through = a subcontractor. First, many in the community do not believe that the = mine always makes aware the State when they are to blast and second, we = do not believe the reported results are accurate. What type of equipment could a home owner put in place that could = monitor such activities, be defensible in court, and be not to pricey? Thank you for your responses. Sincerely, Patrick Wilber
Dear Folks,
 
I am new to this site and my knowledge = of its=20 contents is limited.  The reason I am interested is that our = community=20 lives near a mine that blasts to recover product.  The land use has = changed=20 considerably over the last 10 years (from agricultural to=20 ag-residential/residential/commercial) and we are experiencing damage = due to the=20 blasts.
 
The "governing" authority for mines is = the State=20 Fire Marshall...and the laws governing mining are full of loop holes at=20 best.  The immediate problem is that the mine self-monitors their = blasting=20 activities through a subcontractor.  First, many in the community = do not=20 believe that the mine always makes aware the State when they are to = blast=20 and second, we do not believe the reported results are = accurate.
 
What type of equipment could a home = owner put in=20 place that could monitor such activities, be defensible in court, and be = not to=20 pricey?
 
Thank you for your = responses.
 
Sincerely,
 
Patrick = Wilber
Subject: Re: Hello From: Doug Crice dcrice@............ Date: Wed, 25 Jul 2001 09:52:46 -0700 There is a special class of seismographs used for "blast monitoring" manufactured by Geosonics http://www.geosonics.com , Instantel http://www.instantel.com/ , Vibratech and Thomas Instruments http://www.vibration.com/index.htm These instruments use geophones as the basic sensor, monitored continuously electronically, and they automatically digitize and save any data with a vibration event. They are about the size of a brick, and connect to a laptop. Software provided by the companies analyzes the data for peak particle velocity, spectra, and of course time of occurance. The basic units cost a few thousand dollars, and they can be rented for some fraction of the cost. While it is possible to construct your own device to measure these vibrations, it is highly unlikely that the data would stand up in court. Whether you could rent one and put together a credible case is also unlikely, since you would be testifying against experts. Some of the companies listed above provide the service. If you really want to attack this problem, the surest approach is to hire your own consultant, preferably one smarter and more prestigious than the one used by the mining company. The mining company consultant may or may not be right. I should caution you also that a lot of blast damage is imaginary. Cracks appear in houses and sidwalks for a variety of reasons and they always get blamed on blasting when there is some in the area. > wildboar wrote: > > Dear Folks, > > I am new to this site and my knowledge of its contents is limited. > The reason I am interested is that our community lives near a mine > that blasts to recover product. The land use has changed considerably > over the last 10 years (from agricultural to > ag-residential/residential/commercial) and we are experiencing damage > due to the blasts. > > The "governing" authority for mines is the State Fire Marshall...and > the laws governing mining are full of loop holes at best. The > immediate problem is that the mine self-monitors their blasting > activities through a subcontractor. First, many in the community do > not believe that the mine always makes aware the State when they are > to blast and second, we do not believe the reported results are > accurate. > > What type of equipment could a home owner put in place that could > monitor such activities, be defensible in court, and be not to pricey? > > Thank you for your responses. > > Sincerely, > > Patrick Wilber -- Doug Crice http://www.georadar.com 19623 Via Escuela Drive phone 408-867-3792 Saratoga, California 95070 USA fax 408-867-4900 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: ball bearing pivot point From: johnc c cole johnccole1@........ Date: Wed, 25 Jul 2001 20:44:07 -0500 Dan, congratulations on your success using the ball bearing pivot point. More than a few people are using this method of suspension. I am the person who started people using it . My web site is http://freeweb.pdq.net/fxc/four.htmI I have developed what i call a modified Lehman quad convex surface system for the lower and upper pivot points .The lower and the upper pivot points consist of a ball bearing resting on a convex surface instead of a flat polished bolt head. The ball is chrome nickel steel and the static surfaces are also chrome nickel steel polished to a mirror finish. WE have several of the new quad detectors running at this time and they are looking good. Time will tell. The old wire suspension is long gone on these detectors as well as the turn buckle etc Dan, I believe that it can be proven theoretically, and i have demonstrated empirically , that an increase of convexity at the pivot point can result in increase sensitivity . This makes sense because there is less surface contact between the static and mobile elements of the interface , resulting in less friction and increased isolation of the pendulum. MY modified instruments using this technology have shown remarkable improvement over the standard Lehman detector. I intend to upgrade my site and have pictures of the quad convex surface detector soon. Thanks to Professor Albert Hrubetz of Dallas, Texas for suggesting the convex to convex pivot point concept as well as the extensive research on the new super coils.. Professor Hrubetz, it may be of interest to you to know that i am currently using your role . JOHN W5AUH ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Hello From: "wildboar" wildboar@.............. Date: Thu, 26 Jul 2001 09:44:41 -0400 Thanks for your informative reply. We do realize that there is "settling" of structures that would produce cracks, etc. However, the mine was dormant for several years and development pursued. Some even suggest that there were some back-alley deals made in the what was believed to be a period when the mine was no longer in use. Evidence of large cracks, pictures falling, wells going dry, ....and most influential is a letter from the State Fires Marshall's office declaring that it is their opinion that the blasting causes "harm to life and property". Pretty damaging. So, we are attacking this at all angles. The monitoring suggestions you have will be a benefit to us all. Thanks. Patrick Wilber ----- Original Message ----- From: "Doug Crice" To: Sent: Wednesday, July 25, 2001 12:52 PM Subject: Re: Hello > There is a special class of seismographs used for "blast monitoring" > manufactured by Geosonics http://www.geosonics.com , Instantel > http://www.instantel.com/ , Vibratech and Thomas Instruments > http://www.vibration.com/index.htm > > These instruments use geophones as the basic sensor, monitored > continuously electronically, and they automatically digitize and save > any data with a vibration event. They are about the size of a brick, > and connect to a laptop. Software provided by the companies analyzes > the data for peak particle velocity, spectra, and of course time of > occurance. > > The basic units cost a few thousand dollars, and they can be rented for > some fraction of the cost. While it is possible to construct your own > device to measure these vibrations, it is highly unlikely that the data > would stand up in court. Whether you could rent one and put together a > credible case is also unlikely, since you would be testifying against > experts. Some of the companies listed above provide the service. > > If you really want to attack this problem, the surest approach is to > hire your own consultant, preferably one smarter and more prestigious > than the one used by the mining company. The mining company consultant > may or may not be right. I should caution you also that a lot of blast > damage is imaginary. Cracks appear in houses and sidwalks for a variety > of reasons and they always get blamed on blasting when there is some in > the area. > > > wildboar wrote: > > > > Dear Folks, > > > > I am new to this site and my knowledge of its contents is limited. > > The reason I am interested is that our community lives near a mine > > that blasts to recover product. The land use has changed considerably > > over the last 10 years (from agricultural to > > ag-residential/residential/commercial) and we are experiencing damage > > due to the blasts. > > > > The "governing" authority for mines is the State Fire Marshall...and > > the laws governing mining are full of loop holes at best. The > > immediate problem is that the mine self-monitors their blasting > > activities through a subcontractor. First, many in the community do > > not believe that the mine always makes aware the State when they are > > to blast and second, we do not believe the reported results are > > accurate. > > > > What type of equipment could a home owner put in place that could > > monitor such activities, be defensible in court, and be not to pricey? > > > > Thank you for your responses. > > > > Sincerely, > > > > Patrick Wilber > > -- > Doug Crice http://www.georadar.com > 19623 Via Escuela Drive phone 408-867-3792 > Saratoga, California 95070 USA fax 408-867-4900 > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Hello From: ChrisAtUpw@....... Date: Thu, 26 Jul 2001 15:29:48 EDT In a message dated 26/07/01, wildboar@.............. writes: > Thanks for your informative reply. We do realize that there is "settling" > of structures that would produce cracks, etc. However, the mine was dormant > for several years and development pursued. Is it an underground mine or opencast? What is it producing? What sort of soil / bedrock are you on? How far away from the mine are you and are there any special regulations about this, or for your area? Where are you located? If it is an underground mine, the actual blasting may be a 'red herring' in that it is much more likely to be the subsidance as underground workings are collapsed that does the damage. This should also appear on the seismic monitor. Opinions are NOT evidence and you DO need evidence! You may have to form an association to spread the cost of seismic monitoring, but a lot needs to be done by yourselves. Ask the moitoring company what additional evidence may be helpful or needed? In these days of digital cameras, can you get one which records the date of the pictures? Alternatively, you may need to include a dated newspaper in the first and last photos of a series. However, one of these cameras would enable you to take detailed pictures of your property at least on a weekly basis and then overwrite the card/ disk taken a fortnight ago. It will also make you very conscious of what and when things actually happen. Keep a written diary. It is a lot of work and you won't get success in just a few weeks, but the benefits could be very significant. It would be a good idea if you collected together all incidences of damage and actually photographed them now and then at intervals. Cracks may tend to widen and extend. The Al sticky tape that is used to detect window breakage can be useful here. On an outside brick / mineral block wall, you can drill and fit rods with flat tops on either side of the crack. You then stick a narrow strip of thin glass to the heads with epoxy. Any significant movement breaks the glass. You can also use Al strip or thin Cu wire to electrically monitor for a break. Can you visit a comparable location, but which is not effected by this mine and do a comparison survey looking for damage similar to that which you experience? Have you plotted the damage on a local map with colour coded stickers? >> The "governing" authority for mines is the State Fire Marshall...and the laws governing mining are full of loop holes at best. The immediate problem is that the mine self-monitors their blasting activities through a subcontractor. First, many in the community do not believe that the mine always makes aware the State when they are to blast and second, we do not believe the reported results are accurate. Is the State Fire Marshall elected, or who appoints him? Can you put up an opposition candidate? If the records of your quakes do not tally with those supplied to the State, the State should act, but it may not, which is why you need to develop any available political clout. You need to make officials aware of problems. This involves a lot of people writing a lot of letters and keeping records. Have you made enquires of other places which have successfully got mining damage repaired? Are ther any national associations that you can ask for advice? You may be able to get the mine to carry out repairs without admitting liability. However, if you don't organise, you are much less likely to succeed. Good Luck, Chris In a message dated 26/07/01, wildboar@.............. writes:

Thanks for your informative reply.  We do realize that there is "settling"
of structures that would produce cracks, etc.  However, the mine was dormant
for several years and development pursued.  


      Is it an underground mine or opencast? What is it producing? What sort
of soil /  bedrock are you on? How far away from the mine are you and are
there any special regulations about this, or for your area? Where are you
located?

      If it is an underground mine, the actual blasting may be a 'red
herring' in that it is much more likely to be the subsidance as underground
workings are collapsed that does the damage. This should also appear on the
seismic monitor.

      Opinions are NOT evidence and you DO need evidence! You may have to
form an association to spread the cost of seismic monitoring, but a lot needs
to be done by yourselves. Ask the moitoring company what additional evidence
may be helpful or needed? In these days of digital cameras, can you get one
which records the date of the pictures? Alternatively, you may need to
include a dated newspaper in the first and last photos of a series. However,
one of these cameras would enable you to take detailed pictures of your
property at least on a weekly basis and then overwrite the card/ disk taken a
fortnight ago. It will also make you very conscious of what and when things
actually happen. Keep a written diary. It is a lot of work and you won't get
success in just a few weeks, but the benefits could be very significant.

      It would be a good idea if you collected together all incidences of
damage and actually photographed them now and then at intervals. Cracks may
tend to widen and extend. The Al sticky tape that is used to detect window
breakage can be useful here. On an outside brick / mineral block wall, you
can drill and fit rods with flat tops on either side of the crack. You then
stick a narrow strip of thin glass to the heads with epoxy. Any significant
movement breaks the glass. You can also use Al strip or thin Cu wire to
electrically monitor for a break.

      Can you visit a comparable location, but which is not effected by this
mine and do a comparison survey looking for damage similar to that which you
experience? Have you plotted the damage on a local map with colour coded
stickers?

>> The "governing" authority for mines is the State Fire Marshall...and the
laws governing mining are full of loop holes at best.  The immediate problem
is that the mine self-monitors their blasting activities through a
subcontractor.  First, many in the community do not believe that the mine
always makes aware the State when they are to blast and second, we do not
believe the reported results are accurate.

      Is the State Fire Marshall elected, or who appoints him? Can you put
up an opposition candidate? If the records of your quakes do not tally with
those supplied to the State, the State should act, but it may not, which is
why you need to develop any available political clout. You need to make
officials aware of problems. This involves a lot of people writing a lot of
letters and keeping records.

      Have you made enquires of other places which have successfully got
mining damage repaired? Are ther any national associations that you can ask
for advice? You may be able to get the mine to carry out repairs without
admitting liability. However, if you don't organise, you are much less likely
to succeed.

      Good Luck,

      Chris         Subject: Re: Hello From: james fisher kd6iwd@......... Date: Thu, 26 Jul 2001 13:05:07 -0700 (PDT) --- wildboar wrote: > Thanks for your informative reply. We do realize > that there is "settling" > of structures that would produce cracks, etc. > However, the mine was dormant > for several years and development pursued. Some > even suggest that there > were some back-alley deals made in the what was > believed to be a period when > the mine was no longer in use. Evidence of large > cracks, pictures falling, > wells going dry, ....and most influential is a > letter from the State Fires > Marshall's office declaring that it is their opinion > that the blasting > causes "harm to life and property". Pretty > damaging. > > So, we are attacking this at all angles. The > monitoring suggestions you > have will be a benefit to us all. Thanks. > > Patrick Wilber > > ----- Original Message ----- > From: "Doug Crice" > To: > Sent: Wednesday, July 25, 2001 12:52 PM > Subject: Re: Hello > > > > There is a special class of seismographs used for > "blast monitoring" > > manufactured by Geosonics http://www.geosonics.com > , Instantel > > http://www.instantel.com/ , Vibratech and Thomas > Instruments > > http://www.vibration.com/index.htm > > > > These instruments use geophones as the basic > sensor, monitored > > continuously electronically, and they > automatically digitize and save > > any data with a vibration event. They are about > the size of a brick, > > and connect to a laptop. Software provided by the > companies analyzes > > the data for peak particle velocity, spectra, and > of course time of > > occurance. > > > > The basic units cost a few thousand dollars, and > they can be rented for > > some fraction of the cost. While it is possible > to construct your own > > device to measure these vibrations, it is highly > unlikely that the data > > would stand up in court. Whether you could rent > one and put together a > > credible case is also unlikely, since you would be > testifying against > > experts. Some of the companies listed above > provide the service. > > > > If you really want to attack this problem, the > surest approach is to > > hire your own consultant, preferably one smarter > and more prestigious > > than the one used by the mining company. The > mining company consultant > > may or may not be right. I should caution you also > that a lot of blast > > damage is imaginary. Cracks appear in houses and > sidwalks for a variety > > of reasons and they always get blamed on blasting > when there is some in > > the area. > > > > > wildboar wrote: > > > > > > Dear Folks, > > > > > > I am new to this site and my knowledge of its > contents is limited. > > > The reason I am interested is that our community > lives near a mine > > > that blasts to recover product. The land use > has changed considerably > > > over the last 10 years (from agricultural to > > > ag-residential/residential/commercial) and we > are experiencing damage > > > due to the blasts. > > > > > > The "governing" authority for mines is the State > Fire Marshall...and > > > the laws governing mining are full of loop holes > at best. The > > > immediate problem is that the mine self-monitors > their blasting > > > activities through a subcontractor. First, many > in the community do > > > not believe that the mine always makes aware the > State when they are > > > to blast and second, we do not believe the > reported results are > > > accurate. > > > > > > What type of equipment could a home owner put in > place that could > > > monitor such activities, be defensible in court, > and be not to pricey? > > > > > > Thank you for your responses. > > > > > > Sincerely, > > > > > > Patrick Wilber > > > > -- > > Doug Crice http://www.georadar.com > > 19623 Via Escuela Drive phone 408-867-3792 > > Saratoga, California 95070 USA fax 408-867-4900 > > > __________________________________________________________ > > > > Public Seismic Network Mailing List (PSN-L) > > > > To leave this list email > PSN-L-REQUEST@.............. with > > the body of the message (first line only): > unsubscribe > > See http://www.seismicnet.com/maillist.html for > more information. > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email > PSN-L-REQUEST@.............. with > the body of the message (first line only): > unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: Hello From: "Ron Westfall" westfall@........ Date: Thu, 26 Jul 2001 13:34:09 -0700 The "governing" authority for mines is the State Fire Marshall...and the laws governing mining are full of loop holes at best. The immediate problem is that the mine self-monitors their blasting activities through a subcontractor. First, many in the community do not believe that the mine always makes aware the State when they are to blast and second, we do not believe the reported results are accurate. If all you want to do is verify that the monitoring company is reporting all of the blasts that take place, you could set up your own recording seismograph fairly inexpensively. I would suggest a geophone, some of Larry Cochrane's electronics, and a PC. Larry sell electronics and geophones through his web page at www.seismicnet.com. Most of us are using his electronics. The courts would probably accept your evidence for the occurrence of blasts. Keep in mind that if you try to set up your own equipment, you will record all sorts of local cultural noise (e.g. cars and trucks passing by on nearby roads) in addition to blasts. Situating the seismograph away from such noise will reduce the clutter. Even so, you will get some non-blast events. Through correlation with the blasts that are reported by the monitoring company, you should learn how to distinguish between blast and non-blast events. If you need to record the strength and any other characteristics of the blasts such that they could be used in court, I agree with Doug that you would be better to get professional help. By changing the gain on a seismometer pre-amp, it is easy to create as small or large a trace as you want for a given event. It would be difficult for an amateur to calibrate the seismometer and maintain the calibration over a period of time to stand up in court under expert scrutiny. Ron
The "governing" authority for mines is = the State=20 Fire Marshall...and the laws governing mining are full of loop holes at=20 best.  The immediate problem is that the mine self-monitors their = blasting=20 activities through a subcontractor.  First, many in the community = do not=20 believe that the mine always makes aware the State when they are to = blast=20 and second, we do not believe the reported results are = accurate.
 
If all you = want to do is=20 verify that the monitoring company is reporting all of the blasts that = take=20 place, you could set up your
own = recording=20 seismograph fairly inexpensively.  I would suggest a geophone, some = of=20 Larry Cochrane's electronics, and
a PC.  = Larry sell=20 electronics and geophones through his web page at www.seismicnet.com.  Most of = us are=20 using his
electronics.  The=20 courts would probably accept your evidence for the occurrence of=20 blasts.
 
Keep in mind = that if you=20 try to set up your own equipment, you will record all sorts of local = cultural=20 noise (e.g. cars and
trucks = passing by on=20 nearby roads) in addition to blasts.  Situating the seismograph = away from=20 such noise will reduce
the = clutter.  Even=20 so, you will get some non-blast events.  Through correlation with = the=20 blasts that are reported by the
monitoring = company, you=20 should learn how to distinguish between blast and non-blast=20 events.
 
If you need to record the strength and any=20 other characteristics of the blasts such that they could be used in = court,=20 I
agree=20 with Doug that you would be better to get professional help.  By = changing=20 the gain on a seismometer pre-amp, it
is=20 easy to create as small or large a trace as you want for a given = event.  It=20 would be difficult for an amateur to calibrate
the=20 seismometer and maintain the calibration over a period of time to stand = up in=20 court under expert scrutiny.
 
Ron
 
Subject: mining seismo From: "Bryan&Regina Goss" bgoss@.................. Date: Fri, 27 Jul 2001 00:34:51 -0500 Dallas Instruments ST-4 Seismograph=20 Item # 1450505908 I saw this on ebay used for mining.............
 

Dallas Instruments ST-4 Seismograph

Item # 1450505908 I saw this on ebay used for=20 mining.............

Subject: GPS Group buy update From: "Larry Cochrane" cochrane@.............. Date: Thu, 26 Jul 2001 23:10:53 -0700 GPS'ers, I talked to Chris yesterday. He hopes to send out the units 7/27 or 7/30. It's taking him longer to test each unit then expected, and he has 40 to do. On my end I just received the interface boards, so I'm all ready to go. Once I receive the GPS units from Chris I will start sending them out. -Larry __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: mining seismo From: Doug Crice dcrice@............ Date: Fri, 27 Jul 2001 09:12:10 -0700 This item is of course one of those blast monitoring instruments recently discussed here. This particular one is an older version which records the data on a cassette tape, designed prior to the availablility of low-cost digital components. I would guess that the system can play back analog recordings and probably has an indicator of "peak-particle velocity". The Bureau of Mines has published a document that says vibrations less than 2 inches/second (5 cm/sec) do not damage structures. Except for someone who wants to check up on their local quarry blasting, its principal value would be in the 3-component geophone (probably 4.5 Hz) and the shipping case. > Bryan&Regina Goss wrote: > > > > Dallas Instruments ST-4 Seismograph > > Item # 1450505908 I saw this on ebay used for mining............. -- Doug Crice http://www.georadar.com 19623 Via Escuela Drive phone 408-867-3792 Saratoga, California 95070 USA fax 408-867-4900 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: mining seismo From: "wildboar" wildboar@.............. Date: Fri, 27 Jul 2001 13:51:21 -0400 thanks...will look into it. ----- Original Message -----=20 From: Bryan&Regina Goss=20 To: psn-l@................. Sent: Friday, July 27, 2001 1:34 AM Subject: mining seismo Dallas Instruments ST-4 Seismograph=20 Item # 1450505908 I saw this on ebay used for mining.............
thanks...will look into = it.
----- Original Message -----
From:=20 Bryan&Regina Goss
Sent: Friday, July 27, 2001 = 1:34 AM
Subject: mining seismo

 

Dallas Instruments ST-4 Seismograph

Item # 1450505908 I saw this on ebay used for=20 mining.............

Subject: no access to usgs sites From: Dave Nelson davenn@.............. Date: Sat, 28 Jul 2001 22:33:45 +1000 hi all, i havent been able to access my most used usgs site for the last 2 weeks anyone else found the same ???? http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm for the seismograms was gonna include http://wwwneic.cr.usgs.gov/current_seismicity.shtml but i notice tonite its started working again can anyone else access aslwww ? thanks Dave PS... will get the latest additions done to the psn maps asap dont panic those who are waiting i havent forgotten :) Dave A. Nelson ZL4TBN 13 Monash Rd., Gladesville, (Sydney) 2111 NSW, Australia http://www.seismicnet.com/dave/home.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: no access to usgs sites From: ChrisAtUpw@....... Date: Sat, 28 Jul 2001 09:11:33 EDT In a message dated 28/07/01, davenn@.............. writes: > I haven't been able to access my most used usgs site for the last 2 weeks > anyone else found the same ???? > http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm for the seismograms > was gonna include http://wwwneic.cr.usgs.gov/current_seismicity.shtml > but I notice tonite its started working again can anyone else access aslwww > ? Hi Dave, seems to be functional from the UK on aol, Chris Chapman In a message dated 28/07/01, davenn@.............. writes:

I have n't been able to access my  most used usgs site for the last 2 weeks
 anyone else found the same ????
 http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm  for the seismograms
was gonna include  http://wwwneic.cr.usgs.gov/current_seismicity.shtml
but I notice tonite its started working again can anyone else access aslwww
?


Hi Dave, seems to be functional from the UK on aol, Chris Chapman

Subject: Re: no access to usgs sites From: barry lotz gbl@....... Date: Fri, 27 Jul 2001 06:14:00 -0700 Hi Dave I haven't had any problems with aslwww though I don't access it every day. I do use a slightly different site though. I access .heli2.htm instead. It takes longer to load but you get all the recordings at one time. I like it because I can scan the world to see where the event is strongest an has the first arrival. You can still access the individual record by clicking on it. Regards Barry Dave Nelson wrote: > hi all, > i havent been able to access my most used usgs site for the > last 2 weeks > anyone else found the same ???? > > http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm for the seismograms > > was gonna include http://wwwneic.cr.usgs.gov/current_seismicity.shtml > > but i notice tonite its started working again > can anyone else access aslwww ? > > thanks > Dave > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: no access to usgs sites From: CapAAVSO@....... Date: Sat, 28 Jul 2001 13:41:53 EDT In a message dated 7/28/01 1:39:27 PM GMT Daylight Time, davenn@.............. writes: << hi all, i havent been able to access my most used usgs site for the last 2 weeks anyone else found the same ???? >> Hi Dave, try << http://aslwww.cr.usgs.gov/Seismic_Data/heli2.htm >> This one will take you directly into the live USGS Helicorders where you can see them live to compare how stuff is coming in all around the world. Right now there is a nice one that shows up best and the biggest on the Alaska helicorders. Enjoy, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: no access to usgs sites From: steve hammond shammon1@............. Date: Sat, 28 Jul 2001 11:02:33 -0700 Works from Earthlink in Aptos, CA. Dave. Steve Hammond -----Original Message----- From: Dave Nelson [SMTP:davenn@............... Sent: Saturday, July 28, 2001 5:34 AM To: psn-l@.............. Subject: no access to usgs sites hi all, i havent been able to access my most used usgs site for the last 2 weeks anyone else found the same ???? http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm for the seismograms was gonna include http://wwwneic.cr.usgs.gov/current_seismicity.shtml but i notice tonite its started working again can anyone else access aslwww ? thanks Dave PS... will get the latest additions done to the psn maps asap dont panic those who are waiting i havent forgotten :) Dave A. Nelson ZL4TBN 13 Monash Rd., Gladesville, (Sydney) 2111 NSW, Australia http://www.seismicnet.com/dave/home.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: no access to usgs sites From: steve hammond shammon1@............. Date: Sat, 28 Jul 2001 11:49:24 -0700 Hi Barry, that an interesting site. I didn't know that the heli2.htm site existed. The current data shows somebody setting up the long period in Texas this morning. It has a 10 min. period. What was more impressive was the Alaskan event this morning which the system recorded shortly after being setting up. I love it when that happens. Then you know its really working... Regards, Steve Hammond PSN San Jose -----Original Message----- From: barry lotz [SMTP:gbl@........ Sent: Friday, July 27, 2001 6:14 AM To: psn-l@.............. Subject: Re: no access to usgs sites Hi Dave I haven't had any problems with aslwww though I don't access it every day. I do use a slightly different site though. I access .heli2.htm instead. It takes longer to load but you get all the recordings at one time. I like it because I can scan the world to see where the event is strongest an has the first arrival. You can still access the individual record by clicking on it. Regards Barry Dave Nelson wrote: > hi all, > i havent been able to access my most used usgs site for the > last 2 weeks > anyone else found the same ???? > > http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm for the seismograms > > was gonna include http://wwwneic.cr.usgs.gov/current_seismicity.shtml > > but i notice tonite its started working again > can anyone else access aslwww ? > > thanks > Dave > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: no access to usgs sites From: Seisguy@....... Date: Sat, 28 Jul 2001 15:51:22 EDT In a message dated 7/28/2001 6:17:46 AM Pacific Daylight Time, ChrisAtUpw@....... writes: > In a message dated 28/07/01, davenn@.............. writes: > > > >> I haven't been able to access my most used usgs site for the last 2 >> weeks >> anyone else found the same ???? >> http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm for the seismograms >> was gonna include http://wwwneic.cr.usgs.gov/current_seismicity.shtml >> but I notice tonite its started working again can anyone else access >> aslwww >> ? > I can access it from CA. Also, when their quake list seemed to go down for everybody on AOL last week, I had no problem accessing it thru MSN. Mike O'Bleness In a message dated 7/28/2001 6:17:46 AM Pacific Daylight Time,
ChrisAtUpw@....... writes:


In a m essage dated 28/07/01, davenn@.............. writes:


I have n't been able to access my  most used usgs site for the last 2
weeks
anyone else found the same ????
http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm  for the seismograms
was gonna include  http://wwwneic.cr.usgs.gov/current_seismicity.shtml
but I notice tonite its started working again can anyone else access
aslwww
?



I can access it from CA.  Also, when their quake list seemed to go down for
everybody on AOL last week, I had no problem accessing it thru MSN.

Mike O'Bleness Subject: Re: no access to usgs sites From: Dave Nelson davenn@.............. Date: Sun, 29 Jul 2001 11:44:20 +1000 hi guys, thanks for ur responses weird but have discovered something further.... my Netscape 4.08 WONT access http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm or http://aslwww.cr.usgs.gov/Seismic_Data/heli2.htm but my IE5.5 will .... go figure that one out ha ha ha thanks Cap i only discoverec the above after u said try the ..../heli2.htm site and when i clicked on ur link it opened in IE rather than NS i removed the 2 and it still opened ..../heli.htm then pasted the /heli2.htm into netscape and it still wouldnt open why it should sddenly stop with netscape i have no idea thanks all dave Dave A. Nelson ZL4TBN 13 Monash Rd., Gladesville, (Sydney) 2111 NSW, Australia http://www.seismicnet.com/dave/home.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: no access to usgs sites From: "Ron Westfall" westfall@........ Date: Sat, 28 Jul 2001 23:01:04 -0700 Dave Both heli.htm and heli2.htm display fine using Netscape Communicator 4.76. Not sure how that relates to Navigator 4.08. Maybe its time for an upgrade? Ron -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@................. Behalf Of Dave Nelson Sent: Saturday, July 28, 2001 6:44 PM To: psn-l@.............. Subject: Re: no access to usgs sites hi guys, thanks for ur responses weird but have discovered something further.... my Netscape 4.08 WONT access http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm or http://aslwww.cr.usgs.gov/Seismic_Data/heli2.htm but my IE5.5 will .... go figure that one out ha ha ha thanks Cap i only discoverec the above after u said try the ..../heli2.htm site and when i clicked on ur link it opened in IE rather than NS i removed the 2 and it still opened ..../heli.htm then pasted the /heli2.htm into netscape and it still wouldnt open why it should sddenly stop with netscape i have no idea thanks all dave Dave A. Nelson ZL4TBN 13 Monash Rd., Gladesville, (Sydney) 2111 NSW, Australia http://www.seismicnet.com/dave/home.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: no access to usgs sites From: Bob Smith bobsmith5@........ Date: Sun, 29 Jul 2001 08:27:20 -0400 Dave -- For what it is worth. I was, until yerterday A.M. running Netscape 4.06 and just upgraded to 4.78. I have accessed both of those sites with both versions of Netscape. I seem to recall recently with reports of similar problems that personal fire walls were a problem. Bob Smith Dave Nelson wrote: > > hi guys, > thanks for ur responses weird but have discovered > something further.... my Netscape 4.08 WONT access > http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm or > http://aslwww.cr.usgs.gov/Seismic_Data/heli2.htm > > but my IE5.5 will .... go figure that one out ha ha ha > > thanks Cap i only discoverec the above after u said try the ..../heli2.htm > site and when i clicked on ur link it opened in IE rather than NS > i removed the 2 and it still opened ..../heli.htm then pasted the > /heli2.htm > into netscape and it still wouldnt open > > why it should sddenly stop with netscape i have no idea > > thanks all > dave > > Dave A. Nelson ZL4TBN > 13 Monash Rd., > Gladesville, (Sydney) > 2111 > NSW, Australia > > http://www.seismicnet.com/dave/home.htm > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- --------- Avoid computer viruses -- Practice safe hex ------------- * * Specializing in small, cost effective embedded control systems * * Robert L. (Bob) Smith Smith Machine Works, Inc. internet bobsmith5@.............. Lumlay Road landline 804/745-1065 Richmond, Virginia 23236+1004 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: List of 35 Sites for current EQ locations & seismograms... From: Jim ODonnell jimo17@........ Date: Sun, 29 Jul 2001 09:13:09 -0700 Hi All- Here is a List of 35 Sites for current EQ location & seismograms...Compliments of Andrew Alden of "About Geology". http://geology.about.com/cs/eq_current/index.htm Jim O
 Hi All- Here is a List of 35 Sites for= =20 current EQ location & seismograms...Compliments of Andrew = Alden of=20 "About Geology".
 
http://geology.= about.com/cs/eq_current/index.htm
 
Jim O
 
Subject: Fw: Re: no access to usgs sites From: "Larry Cochrane" cochrane@.............. Date: Sun, 29 Jul 2001 12:16:36 -0700 From John Lahr, -Larry >Date: Sat, 28 Jul 2001 23:40:19 -0600 >To: cochrane@.............. >From: The Lahrs >Subject: Re: no access to usgs sites >Bcc: f\john\PSN-PEPP > >Hi Dave, > >I noticed that for Netscape 4.08 nothing shows up below the >page titles until all of the images have downloaded. On IE 5.50, >however, I can see each seismogram as it is downloaded. > >Last week, staring sometime during the weekend and extending >until Wednesday morning, all of the USGS was cut off from the >Internet for most sites around the world. This was due to the >ISP that carries most of our traffic cutting the USGS off due to >too many USGS computers getting hacked by the virus that was >going around and infecting MS IIS web servers. > >Cheers, >John > > >At 07:44 PM 7/28/2001 , you wrote: >>hi guys, >> thanks for ur responses weird but have discovered >>something further.... my Netscape 4.08 WONT access >>http://aslwww.cr.usgs.gov/Seismic_Data/heli.htm or >>http://aslwww.cr.usgs.gov/Seismic_Data/heli2.htm >> >>but my IE5.5 will .... go figure that one out ha ha ha >> >>thanks Cap i only discoverec the above after u said try >>the ..../heli2.htm >>site and when i clicked on ur link it opened in IE rather than NS >>i removed the 2 and it still opened ..../heli.htm then pasted the >>/heli2.htm >>into netscape and it still wouldnt open >> >>why it should sddenly stop with netscape i have no idea >> >>thanks all >>dave >> >> Dave A. Nelson ZL4TBN >> 13 Monash Rd., >> Gladesville, (Sydney) >> 2111 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: List of 35 Sites for current EQ locations & seismograms... From: "Larry Conklin" lconklin@............ Date: Sun, 29 Jul 2001 16:57:41 -0400 Here is another link, to my favorate site for real time data. =20 =20 http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl?id=3D =20 The seismograms on this site are updated every ten minutes or so. The = Lamont Doherty Lab is only about 200 miles from me, so it's very = interesting to see what they are getting when I see something on my own = system. ----- Original Message -----=20 From: Jim ODonnell=20 To: psn-l@................. Sent: Sunday, July 29, 2001 12:13 PM Subject: List of 35 Sites for current EQ locations & seismograms... Hi All- Here is a List of 35 Sites for current EQ location & = seismograms...Compliments of Andrew Alden of "About Geology". http://geology.about.com/cs/eq_current/index.htm Jim O=20
Here is another link, to my favorate site for real = time=20 data. 
 
    http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl?id=3D=
 
The seismograms on this site are updated every ten = minutes or=20 so.  The Lamont Doherty Lab is only about 200 miles from me, so = it's very=20 interesting to see what they are getting when I see something on my own=20 system.
----- Original Message -----
From:=20 Jim = ODonnell
Sent: Sunday, July 29, 2001 = 12:13=20 PM
Subject: List of 35 Sites for = current EQ=20 locations & seismograms...

 Hi All- Here is a List of 35 Sites = for=20 current EQ location & seismograms...Compliments of Andrew = Alden=20 of "About Geology".
 
http://geology.= about.com/cs/eq_current/index.htm
 
Jim O
 
Subject: Web article of interest From: "meredith lamb" mlamb1@......... Date: Mon, 30 Jul 2001 12:52:55 -0700 Hi all, Check out: "Big Quake Theory At Fault" Small earthquakes may help predict large ones after all. http://www.nature.com/nsu/010726/010726-8.html __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: The Stephenson Probe, a novel sensor : http://www.gns.cri.nz/earthact/probe/index.html From: "Mark Robinson" other@............... Date: Fri, 3 Aug 2001 16:13:52 +1200 I thought folks may be interested in this. I know no more about it. Mark __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: GPS questions From: "angel@chiriqui" angel@............ Date: Fri, 3 Aug 2001 22:46:17 -0400 Hello all, I have an Oncore GPS up and running with Larry's interface board and hooked up to the serial port of a PC. I'm also running WinOncore and I have the DOS software also but have not run it yet. Most of WinOncore seems to be running but I can't seem to figure out how to set the PC clock. I also want to be able to keep the proper time in the background while I run a data collection program. Any hints? angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: GPS Group Buy From: "Larry Cochrane" cochrane@.............. Date: Sat, 4 Aug 2001 15:06:40 -0700 All, The GPS receivers and antennas arrived on Friday. For the people who already paid I will send out the orders on Monday. If you placed an order and have not sent in your payment, now would be a good time to do it. Here's some info on the GPS timing system; If you ordered the receiver without the interface board you will need to power the receiver with 5 VDC. The current requirements is around 200 ma with the antenna attached. Since the serial input/output is not standard RS232 voltage levels you will need to use a chip like the MAX232 RS232 driver / receiver IC. If you are going to use it with SDR you will also need to wire up the 1 PPS signal. You can either place it on pin 1 of the 9 pin RS232 connector or run a digital line to the 37 pin IO connector. If you ordered the unit with the interface all you will needed to do is supply a DC voltage in the range of ~7 to 40 volts. The current requirements with the antenna attached is ~185 ma at 8 VDC, 125 ma at 12 VDC and 100 ma at 15 VDC. The power should be applied to the +pwr and -pwr solder holes. Do not use the +- Bat inputs. Since the GPS receivers already have a battery installed in them, these inputs should be left open. To connect the unit to your PC use a standard serial cable. You do not need a null modem adapter or cross-over cable. In SDR set the "Set Time Using Comm Port" menu item to the port number and set "GPS Mode" to Yes. After restarting SDR it may take a while for the unit to first lock up to the GPS time. I bought a few extra receivers and antennas so if you would like one send me an email message. -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: The Stephenson Probe, a novel sensor : http://www.gns.cri.nz/earthact/probe/index.html From: Casey Crane ogzax@........ Date: Sun, 5 Aug 2001 08:27:19 -0700 Hey y'all, What is a stephenson probe ? Casey ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: The Stephenson Probe, a novel sensor : From: Doug Crice dcrice@............ Date: Sun, 05 Aug 2001 20:42:50 -0700 I think the web site http://www.gns.cri.nz/earthact/probe/index.html does an adequate job of explaining what a Stephenson probe is, so probably the correct question is why? It is well known that earthquakes cause much more damage to buildings located on soil than on rock. This is because the soil resonates and amplifies the vibrations not unlike a bowl of jello will shake when you bump it (not to mention the separate problem of liquefaction). The worse (and thicker) the soil, the worse the problem as evidenced by the extensive damage in the Marina district from the 1989 Loma Prieta Earthquake. That soil was mud dredged up from the bay, and thus is younger even than the city. So, structural engineers take an interest in a factor called "ground spectral amplification ratio", which is a measure of the increase in acceleration between bedrock and the surface (and the dominant frequencies caused by the resonating soil). In some cases, buildings are designed to resonate at different frequencies than the ground, minimizing the destruction. The usual investigation procedure is to measure the velocities of P waves and shear waves on different layers in a soil structure. Those parameters and the density are plugged into a program called "Shake", which predicts the ground spectral amplification ratio. Anybody who wants to learn more about the procedures for making these measurements can download my paper on "Borehole Shearwave Velocity Measurements" from http://www.georadar.com/Shearwaves2.pdf Now good scientists occasionally like to test their theories with actual measurements. One way is to plant accelerometers in a soil foundation at different depths, for example, one at the bottom in bedrock, one mid depth, and one near the surface. Then, you simply wait for an earthquake and record the actual vibrations which are readily converted into ground spectral amplification ratio. You can compare actual results with predicted ones and present a paper at a scientific meeting showing the comparisons. The way this is usually implemented is to drill a borehole down to "rocklike material" and install borehole accelerometers wired to a surface recording system. The sensors can be clamped in place ot grouted in place, depending on whether you ever want to see them again. The "Stephenson Probe" is merely a mechanism to circumvent the process of drilling and preparing the borehole. The accelerometer package is pushed into the ground on the end of a rod by a standard vehicle widely used in soils testing (called a penetrometer). Soils engineers believe rightly that the harder it is to force a rod into the ground, the better the foundation material. The method of installing accelerometers at depth is more economical than the conventional method and Mr. Stephenson has attached his name to the device. Casey Crane wrote: > > Hey y'all, > What is a stephenson probe ? > > Casey > ________________________________________________________________ > GET INTERNET ACCESS FROM JUNO! > Juno offers FREE or PREMIUM Internet access for less! > Join Juno today! For your FREE software, visit: > http://dl.www.juno.com/get/tagj. > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- Doug Crice http://www.georadar.com 19623 Via Escuela Drive phone 408-867-3792 Saratoga, California 95070 USA fax 408-867-4900 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: The Stephenson Probe, a novel sensor : http://www.gns.cri.nz/earthact/pr... From: ChrisAtUpw@....... Date: Mon, 6 Aug 2001 00:58:18 EDT In a message dated 06/08/01, dcrice@............ writes: > I think the web site http://www.gns.cri.nz/earthact/probe/index.html > does an adequate job of explaining what a Stephenson probe is, so > probably the correct question is why?.... You explanation of why was fine, Doug. > Casey Crane wrote: > > Hey y'all, What is a stephenson probe? > However, I agree with Casey. We are told nothing except that it is an accelerometer mounted in a strong case that can be pushed into the ground. A few minor details like what frequency ranges and what axes does it measure, what power supplies does it need, what is it's output, could all be of interest? You don't acquire kit like that for it's decorative properties or because it is called Stephenson. A rough idea of what he considers is 'low cost', might be enlightening. More pertinent, is it something that we might want to use / could use? Say if we happened to find an abandoned one and dug it up? Regards, Chris Chapman In a message dated 06/08/01, dcrice@............ writes:

I thin k the web site http://www.gns.cri.nz/earthact/probe/index.html
does an adequate job of explaining what a Stephenson probe is, so
probably the correct question is why?....

      You expl anation of why was fine, Doug.

Casey Crane wrote:
> Hey y'all, What is a stephenson probe?

      However, I agree with Casey. We are told nothing except that it is an
accelerometer mounted in a strong case that can be pushed into the ground.

      A few minor details like what frequency ranges and what axes does it
measure, what power supplies does it need, what is it's output, could all be
of interest? You don't acquire kit like that for it's decorative properties
or because it is called Stephenson.  A rough idea of what he considers is
'low cost', might be enlightening.

      More pertinent, is it something that we might want to use / could use?
Say if we happened to find an abandoned one and dug it up?

      Regards,

      Chris Chapman
Subject: Re: GPS questions From: "Mauro Mariotti" mariottim@............ Date: Mon, 6 Aug 2001 13:26:28 +0200 Angel, i'm back just today. I have no experience on GPS, sorry, when you send me the two i'll study them and then i'll can to help you... To keep the time updated in background i think the driver should do it in someway... See you... mauro ----- Original Message ----- From: "angel@chiriqui" To: "Larry Cochrane" Sent: Saturday, August 04, 2001 4:46 AM Subject: GPS questions > Hello all, > > I have an Oncore GPS up and running with Larry's interface board and > hooked up to the serial port of a PC. I'm also running WinOncore and I have > the DOS software also but have not run it yet. > > Most of WinOncore seems to be running but I > can't seem to figure out how to set the PC clock. > > I also want to be able to keep the proper time in the background while > I run a data collection program. > > Any hints? > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re[2]: GPS questions From: "angel@chiriqui" angel@............ Date: Mon, 6 Aug 2001 07:57:12 -0400 Hello Mauro, I have the GPS running and keeping time just fine. On the same system I have a Seislog running. I am using a software called TAC32 it is much better than WinOncore. I am now getting my systems ready to leave for four months. Hopefully all in Seislog. It is good to hear from you. angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: The Stephenson Probe, a novel sensor : From: Doug Crice dcrice@............ Date: Mon, 06 Aug 2001 06:16:39 -0700 As the site says, these systems are "strong-motion seismographs" usually recording accelerations in the range of 0 to 1 g. They would be of little use to most members of the PSN society. Or, if you did want to record strong motions, you could use off the shelf accelerometers as per the PSN web site http://www.webtronics.com/strongmotion.html and http://www.webtronics.com/adx05chip.txt In this context, "low-cost" means it's a lot cheaper to squash a rod into the ground than to drill a borehole and case it with plastic pipe. I'm not sure I believe an "order of magnitude" cheaper (unless you don't count bringing the rig on site) but substantially cheaper. Cheaper in this context means thousands of dollars instead of tens-of-thousands of dollars. Doug __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: Re[2]: GPS questions From: "Ron Westfall" westfall@........ Date: Mon, 6 Aug 2001 10:55:00 -0700 Angel Can you provide more information about the TAC32 software? For example, where did you get it? Is it free/shareware? Ron > -----Original Message----- > From: psn-l-request@.............. > [mailto:psn-l-request@................. Behalf Of angel@chiriqui > Sent: Monday, August 06, 2001 4:57 AM > To: Mauro Mariotti > Subject: Re[2]: GPS questions > > > Hello Mauro, > > I have the GPS running and keeping time just fine. On the same system > I have a Seislog running. > > I am using a software called TAC32 it is much better than WinOncore. > > I am now getting my systems ready to leave for four months. Hopefully > all in Seislog. > > It is good to hear from you. > > angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS questions From: Bob Smith bobsmith5@........ Date: Mon, 06 Aug 2001 14:18:25 -0400 TAC32 is a commercially licensed product. For further information and trial versions see http://www.tapr.org/tapr/html/Ftac32.html If you are an amateur radio type and a member of TAPR discounts may apply. Good luck, Bob Smith Ron Westfall wrote: > > Angel > > Can you provide more information about the TAC32 software? > For example, where did you get it? Is it free/shareware? > > Ron > > > -----Original Message----- > > From: psn-l-request@.............. > > [mailto:psn-l-request@................. Behalf Of angel@chiriqui > > Sent: Monday, August 06, 2001 4:57 AM > > To: Mauro Mariotti > > Subject: Re[2]: GPS questions > > > > > > Hello Mauro, > > > > I have the GPS running and keeping time just fine. On the same system > > I have a Seislog running. > > > > I am using a software called TAC32 it is much better than WinOncore. > > > > I am now getting my systems ready to leave for four months. Hopefully > > all in Seislog. > > > > It is good to hear from you. > > > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- --------- Avoid computer viruses -- Practice safe hex ------------- * * Specializing in small, cost effective embedded control systems * * Robert L. (Bob) Smith Smith Machine Works, Inc. internet bobsmith5@.............. Lumlay Road landline 804/745-1065 Richmond, Virginia 23236+1004 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re[4]: GPS questions From: "angel@chiriqui" angel@............ Date: Mon, 6 Aug 2001 14:20:40 -0400 Hello Ron, Monday, August 06, 2001, 1:55:00 PM, you wrote: RW> Can you provide more information about the TAC32 software? RW> For example, where did you get it? Is it free/shareware? Larry suggested it to me. You can get it at http://www.tapr.org/tapr/html/Ftac32.html The price from tapr.org $55.00 and I don't think you have to be a member. The price from the manufacturer CNS is $89. The TAPR is a deal. I am using it on the 30 free trail but I plan buy it soon, the demo seems to be fully functional. It fired up the first time, no messing around! I am running it to set the time of the PC. I set PC's time every minute. The data collecting Seislog program is getting it's time from the PC clock. Everything seems to be working just fine. regards, angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: The Stephenson Probe, a novel sensor : http://www.gns.cri.nz/earthact/probe/index.html From: "Ron Westfall" westfall@........ Date: Mon, 6 Aug 2001 11:33:55 -0700 Hi When I read the Stephenson probe description at the NZ web site, I get a strong impression that the novelty is in the small size of the sensor rather than the installation method. If you look through some of the publications on the site and search elsewhere on the net, the main technique in penetrometry appears to be the Cone Penetration Test (CPT). You will also find that the CPT has an extensive history. I found one mention of doing CPTs during Apollo mission EVAs. Presumably they were on the moon at the time. :-) If you look at the picture on the web page, Bill Stephenson is holding a very small device in his right hand and the complete package in his left hand. Without accurate dimensions, I'm guessing that the overall package is more narrow than a traditional triaxial geophone sensor. Like Casey, I am curious as to the technology used in the sensor to reduce the size and, as claimed, the cost. The device in Bill's right hand might almost be a chip, so I wonder if he is using a chip similar to the ADXL05 or its kin? Unfortunately the web site has no description of the sensor technology. I checked the NZ and US Patent Office to see if it had been patented, but I couldn't find anything. If anybody else finds anything, please pass it along. Ron __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Re[2]: GPS questions From: "Mauro Mariotti" mariottim@............ Date: Mon, 6 Aug 2001 20:54:51 +0200 Hello Angel, when you will start your long trip? Do you will send me the gps before the trip? Are you reconfigured all stations with seislog? If yes this mean i should provide a solution for converting nordic to psn... TAC32 is dowloadable from somewhere? Hope all thing will run good on your seismic network! Thank you Mauro ----- Original Message ----- From: "angel@chiriqui" To: "Mauro Mariotti" Sent: Monday, August 06, 2001 1:57 PM Subject: Re[2]: GPS questions > Hello Mauro, > > I have the GPS running and keeping time just fine. On the same system > I have a Seislog running. > > I am using a software called TAC32 it is much better than WinOncore. > > I am now getting my systems ready to leave for four months. Hopefully > all in Seislog. > > It is good to hear from you. > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re[2]: GPS questions From: "angel@chiriqui" angel@............ Date: Mon, 6 Aug 2001 15:37:29 -0400 Hello Mauro, > when you will start your long trip? > Do you will send me the gps before the trip? My trip starts on the 5th of spetember and I will be going to Seattle first where the 4.5 3 compnent device is and the all the GPS's are. I will be sending then to you about the 12th of September. > Are you reconfigured all stations with > seislog? Two so far and the other two latter this week and early next. > If yes this mean i should provide a solution > for converting > nordic to psn... Well yes, Nordic to PSN is something that would be nice because then one could share files with all PSN members. I just bought a Perl book and have it on my list to learn some Perl programming. One of the first things I will try are file converions programs nordic to psn will be the first I will try. It msight take me a long time but I have to learn some programming. I have a perl programs that I asked a friend of mine to write. He did it in ten minutes. The program pings any address at some interval you want and if it does not get an answer in a certain number of tried it reset the computer. I have one machine that hangs up when the phone company resets it's frame relay line. for example the command line would be pingchck 200.46.19.97 60 5 that would ping 200.46.19.97 every hour and if it failed to get a response 5 times it would reset the PC. Another program he did roughly and did not finish but I can see how it would be done. Will check to see if Seislog (or any program) is writing to a certain directory. If in a certain amount of time no activity is happening in that directory it resets the computer. I want to use them for software watchdogs. I hope to be able to do some basic Perl things by the time I get back from the long trip. > TAC32 is dowloadable from somewhere? yes, the demo is at http://www.tapr.org/tapr/html/Ftac32.html it works very nice > Hope all thing will run good on your seismic network! I am still playing with the trigger sets but that will be done soon. warmly angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re[4]: GPS questions From: "angel@chiriqui" angel@............ Date: Mon, 6 Aug 2001 17:36:38 -0400 Hello PSN, Sorry about the last message it was ment to be for Mauro! I just hit reply. angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: The Stephenson Probe, a novel sensor : http://www.gns.cri.nz/earthact/pr... From: Casey Crane ogzax@........ Date: Mon, 6 Aug 2001 14:42:33 -0700 Hey all, A few days ago I asked what a Stephenson sensor was and now I know. I've tried using a couple of the ADX line of accelerometers and was greatly dissapointed as the noise output of these was horrific. Casey ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: The Stephenson Probe, a novel sensor : From: Doug Crice dcrice@............ Date: Mon, 06 Aug 2001 14:02:17 -0700 Noise is relative. If you had an earthquake strong enough to knock over tall buildings in a single bound, these would probably be perfectly adequate. They are not at all suitable for recording teleseisms and events too small to waken a sleeping dog. Casey Crane wrote: > > Hey all, > > A few days ago I asked what a Stephenson sensor was and now I > know. I've tried using a couple of the ADX line of accelerometers and was > greatly dissapointed as the noise output of these was horrific. > > Casey > ________________________________________________________________ > GET INTERNET ACCESS FROM JUNO! > Juno offers FREE or PREMIUM Internet access for less! > Join Juno today! For your FREE software, visit: > http://dl.www.juno.com/get/tagj. > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- Doug Crice http://www.georadar.com 19623 Via Escuela Drive phone 408-867-3792 Saratoga, California 95070 USA fax 408-867-4900 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Stephenson probe From: "Bill Stephenson" bill.stephenson@.............. Date: Tue, 7 Aug 2001 00:17:58 nzst Hi, I've briefly joined the list because I've been told (and I see that it is true) that some list subscribers have shown interest in my invention. Dealing with some of the points ...... * It is intended for strong motion sensing, so probably would not have the high sensitivity and low noise demanded in teleseismic studies. * The technology is based on a micromachined silicon chip. I can't tell you too much about it as the device has been commercialized. But it does better than the capacitance sensing that airbag sensors use, in terms of noise. It uses a piezoresistive bridge sensing beam deformation. * It is intended as a plug-in replacement for common accelerographs - the ad hoc power supply voltage is 12v dc, the ad hoc sensitivity is 1.25 volt/g, and it is dc to 50Hz. * The prime advantage is cheap installation, and the small size is the key to that because it reduces the force required to push it into the ground. * Installation is simple and cheap. Our web page http://www.gns.cri.nz/earthact/probe/index.html shows installation at Texcoco, Mexico. Five probes were installed there at 40m, 30m, 20m, 10m and 2m below the ground in the course of a single day. Work out the price advantage for yourself! * I have run two vertical arrays of these probes in New Zealand in the last few years. The arrays have given plenty of direct empirical evidence of the variation of motion with depth, for several felt earthquakes. * The appropriate venue to follow the topic up in is to email s-probe@........... but it is essential to use the word "subsurface" in the subject line or our spam blocker will reject it. I think the efforts of PSN are valuable. Regards, Bill Stephenson __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: The Stephenson Probe, a novel sensor : http://www.gns.cri.nz/earthact/p... From: ChrisAtUpw@....... Date: Mon, 6 Aug 2001 21:29:57 EDT ..Casey Crane wrote: >> I've tried using a couple of the ADX line of accelerometers and was greatly >> dissappointed, as the noise output of these was horrific. In a message dated 06/08/01, dcrice@............ writes: > Noise is relative. If you had an earthquake strong enough to knock over > tall buildings in a single bound, these would probably be perfectly > adequate. They are not at all suitable for recording teleseisms and events > I would sort of like to know about the quake just a bit before buildings start to collapse... If Casey checks my EMail of 25/05/2001 he will see how to make a sensitive sensor using a large piezo disk / sonalert. See also letter 'piezo-geophone' on 02/07/01 by kd6iwd@.......... I can pick up a car over 1/2 mile away on the main road with mine, on a still night. Forget the ADX / silicon chips; there is nothing else to touch a piezo under $10! You won't be disappointed. Regards, Chris Chapman .Casey Crane wrote:

>> I've tried using a couple of the ADX line of accelerometers and was greatly
>> dissappointed, as the noise output of these was horrific.

In a message dated 06/08/01, dcrice@............ writes:

Noise is relative.  If you had an earthquake strong enough to knock over
tall buildings in a single bound, these would probably be perfectly
adequate. They are not at all suitable for recording teleseisms and events
too small to waken a sleeping dog.


      I would sort of like to know about the quake just a bit before
buildings start to collapse...

      If Casey checks my EMail of 25/05/2001 he will see how to make a
sensitive  sensor using a large piezo disk / sonalert. See also letter
'piezo-geophone' on 02/07/01 by kd6iwd@.......... I can pick up a car over
1/2 mile away on the main road with mine, on a still night. Forget the ADX /
silicon chips; there is nothing else to touch a piezo under $10! You won't be
disappointed.

      Regards,

      Chris Chapman Subject: Testing, please delete From: "Larry Cochrane" lac@.................... Date: Mon, 6 Aug 2001 20:16:02 -0700 Sorry, I am testing out a new mail server. No need to reply..... -Larry Cochrane Redwood City, PSN Subject: Re: GPS questions From: Bob Smith bobsmith5@........ Date: Wed, 08 Aug 2001 11:03:53 -0400 You do not have to be a member to purchase from TAPR but, members do enjoy a small discount. The price may be a bit higher for non-members. I believe I saw a recent message from Angel that said that he was still searching for the DOS version of GPS ONCORE software. I think I have located the copy that I have been using with my M12 ONCORE and will forward a zip file version of the package (about 500 KB) to anyone that will send me a private email (I will not respond to requests made on the list) that has as its subject line, "Please send GPS11x9.zip". Responses will be handled strictly on a time available basis and I reserve the right to withdraw this offer at any time for any reason. The file will be distributed exactly as I received it about one year ago. Absolutely no technical support of any kind is offered. Bob Smith "angel@chiriqui" wrote: > > Hello Ron, > > Monday, August 06, 2001, 1:55:00 PM, you wrote: > > RW> Can you provide more information about the TAC32 software? > RW> For example, where did you get it? Is it free/shareware? > > Larry suggested it to me. > > You can get it at http://www.tapr.org/tapr/html/Ftac32.html > > The price from tapr.org $55.00 and I don't think you have to be a > member. The price from the manufacturer CNS is $89. The TAPR is a deal. > > I am using it on the 30 free trail but I plan buy it soon, the demo > seems to be fully functional. > > It fired up the first time, no messing around! > > I am running it to set the time of the PC. I set PC's time every > minute. The data collecting > Seislog > program is getting it's time from the PC clock. Everything seems to be working just fine. > > regards, > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- --------- Avoid computer viruses -- Practice safe hex ------------- * * Specializing in small, cost effective embedded control systems * * Robert L. (Bob) Smith Smith Machine Works, Inc. internet bobsmith5@.............. Lumlay Road landline 804/745-1065 Richmond, Virginia 23236+1004 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: From: Casey Crane ogzax@........ Date: Fri, 10 Aug 2001 18:16:38 -0700 Hi all, It's been quiet for several days. Is it my service or is the PSN just real quiet ? Casey ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: It's quiet -- I think From: Bob Fryer bfryer@............ Date: Fri, 10 Aug 2001 20:00:52 -0700 >Hi all, > > It's been quiet for several days. Is it my service or is the PSN >just real quiet ? > >Casey >________________________________________________________________ >GET INTERNET ACCESS FROM JUNO! >Juno offers FREE or PREMIUM Internet access for less! >Join Juno today! For your FREE software, visit: >http://dl.www.juno.com/get/tagj. >__________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email PSN-L-REQUEST@.............. with >the body of the message (first line only): unsubscribe >See http://www.seismicnet.com/maillist.html for more information. ----- earthquake WARNING research ----- --- animals, people, scientific evidence --- --- http://www.earthquakewarning.org --- __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: It's quiet -- I think From: Stephen & Kathy skmort@.......... Date: Fri, 10 Aug 2001 21:41:44 -0700 Most, including me, seem to be lurking????? I was a little surprised that there was no traffic from the PSN about today's 5.5 Portola quake. At 76 miles North from me, it just barely saturated my 12 bit Dataq A/D on one P wave and about eight S waves! I was walking at the time, so I didn't feel it as such, although I had a little light headedness and could hear the house creak. Stephen PSN Station #55 near Pilot Hill Ca 38.828N 120.979W Bob Fryer wrote: > >Hi all, > > > > It's been quiet for several days. Is it my service or is the PSN > >just real quiet ? > > > >Casey __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Quake at 8/11/01 at about 05:55 UTC From: "Nick & Sophie Caporossi" nickcap@............. Date: Sat, 11 Aug 2001 12:01:49 -0400 Hi:=20 Has anyone pinpoint where an event took place this morning? It arrived = here in East Coast at about 05:55 utc ? Thanks Nick Caporossi
Hi:
Has anyone pinpoint where an event took place = this=20 morning? It arrived here in East Coast at about 05:55 utc ?
 
Thanks
Nick Caporossi
Subject: Re: Quake at 8/11/01 at about 05:55 UTC From: Canie canie@........... Date: Sat, 11 Aug 2001 09:48:00 -0700 Red Puma has this listed: 11Aug2001 05:50:46.6 16.6N 92.7W 33 mb=4.6 M MAD CHIAPAS, MEXICO I can't get through to the mexican maps though.. Canie At 12:01 PM 8/11/01 -0400, you wrote: >Hi: >Has anyone pinpoint where an event took place this morning? It arrived >here in East Coast at about 05:55 utc ? > >Thanks >Nick Caporossi __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: It's quiet -- I think From: barry lotz gbl@....... Date: Fri, 10 Aug 2001 12:20:21 -0700 Stephen Shook my house pretty good in Grass Valley. I haven't looked at the trace. I'm pretty sure everything was saturated. Barry (39.23N 121.07N) Stephen & Kathy wrote: > Most, including me, seem to be lurking????? I was a little surprised that there > was no traffic from the PSN about today's 5.5 Portola quake. At 76 miles North > from me, it just barely saturated my 12 bit Dataq A/D on one P wave and > about eight S waves! I was walking at the time, so I didn't feel it as such, > although I had a little light headedness and could hear the house creak. > Stephen > PSN Station #55 > near Pilot Hill Ca > 38.828N 120.979W __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Quake at 8/11/01 at about 05:55 UTC From: acme100 acme100@........... Date: Sat, 11 Aug 2001 21:10:59 -0500 I saw that one here in N. Alabama, but did not have a fix on it yet - thx for the data - what is the URL for Red Puma? Steve Jones Huntsville, Alabama Canie wrote: > Red Puma has this listed: > 11Aug2001 05:50:46.6 16.6N 92.7W 33 mb=4.6 M MAD CHIAPAS, MEXICO > > I can't get through to the mexican maps though.. > > Canie > > At 12:01 PM 8/11/01 -0400, you wrote: > >Hi: > >Has anyone pinpoint where an event took place this morning? It arrived > >here in East Coast at about 05:55 utc ? > > > >Thanks > >Nick Caporossi > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. ---------------------------------------------------- NetZero Platinum Sign Up Today - Only $9.95 per month! http://my.netzero.net/s/signup?r=platinum&refcd=PT97 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Quake at 8/11/01 at about 05:55 UTC From: Canie canie@........... Date: Sat, 11 Aug 2001 20:47:16 -0700 Here's Red Puma: http://seismo.ethz.ch/redpuma/redpuma_ami_list.html And another good quick list location is: http://www.emsc-csem.org/cgi-bin/ALERT_all_messages.sh?1 Canie At 09:10 PM 8/11/01 -0500, you wrote: >I saw that one here in N. Alabama, but did not have a fix on it yet - thx >for the data - what is the URL for Red Puma? > >Steve Jones >Huntsville, Alabama __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: SAC_BINARY From: "Francesco" franuc@...... Date: Sun, 12 Aug 2001 11:09:40 +0200 Hi all. Can anyone help me to know the real structure of a SAC_BINARY? I found around the web many sites about it with a lot of information, but not the structure, the header ecc..... Regards Francesco - Italy __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: updates and additions From: Dave Nelson davenn@.............. Date: Sun, 12 Aug 2001 21:23:01 +1000 hi ya all, greetings from the land down under some updates to the PSN list i completed this weekend Karl Cunningham some updates to ur listing and 2 new members Steve Shufflebotham, Shropshire, United Kingdom and Thomas Cook, Las Vegas, NV, USA welcome to u 2 enjoy ur stay with the group... if u havent visited Larry's pages yet go to http://www.seismicnet.com/ cheers Dave Dave A. Nelson ZL4TBN 13 Monash Rd., Gladesville, (Sydney) 2111 NSW, Australia http://www.seismicnet.com/dave/home.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: R: SAC_BINARY From: "Giovanni Rotta" rottag@.......... Date: Sun, 19 Nov 2000 15:25:37 +0100 Anche a spiegartelo non lo capiresti comunque !!... Ti mancavo eh !! ecchio porcellone !! gio ----- Original Message ----- From: Francesco To: Sent: Sunday, August 12, 2001 10:09 AM Subject: SAC_BINARY > Hi all. > Can anyone help me to know the real structure of a SAC_BINARY? > I found around the web many sites about it with a lot of information, but > not the structure, the header ecc..... > > Regards > Francesco - Italy > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Quake at 8/11/01 at about 05:55 UTC From: Canie canie@........... Date: Sun, 12 Aug 2001 09:10:18 -0700 It seems it finally made it to the NEIC list: 01/08/11 05:50:40 UTC 14.04N 91.79W Depth: 33.0 km 5.1M GUATEMALA Canie At 12:01 PM 8/11/01 -0400, you wrote: >Hi: >Has anyone pinpoint where an event took place this morning? It arrived >here in East Coast at about 05:55 utc ? > >Thanks >Nick Caporossi __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: geophone for urban search work From: "Larry Cochrane" cochrane@.............. Date: Sun, 12 Aug 2001 13:29:42 -0700 Rick, I'm not sure if a geophone would be good for this type of thing, maybe....I'm CCing the PSN mailing list. Maybe someone on the list has some ideas for you. PSN'ers, please CC Rick at seadog@....... since he is not on the list. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "Rick Howard" To: Sent: Sunday, August 12, 2001 12:43 AM Subject: geophone for urban search work > Larry, > > Please advise whether you feel a geophone like the Mark > Products L10B you have for sale might prove useful as > a device to detect a person tapping on a collapsed structure > when buried under rubble. > > I'm a Technical Search Specialist for one of the FEMA > Urban Search & Rescue Task Forces, and we use a > sophisticated device (http://www.delsar.com) as a person > locator, but this equipment is expensive and limited as > far as access for training. How might a geophone work as > as a detector if someone was tapping on a structure (pipe, > concrete, etc) 20-100 feet away? The general frequency > range the Delsar unit calls for is 1-3000 Hz. I'd love > to buy a geophone to experiment with. I can solder circuits > pretty well, if you can recommend a circuit to go with it. > > Any advice would be appreciated. I serve in search and > rescue as a volunteer; you'll incur no liability in > giving me your recommendation - I'm just looking to > experiment with other available, cheaper tools in a > quest to do my search job better. > > Thanks - > > Rick Howard > Tech Search Specialist > California Task Force 3, Menlo Park > > ____________________________________________________________ > woof! woof! I'm @....... > Get your free @dog e-mail at http://www.dog.com > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: unsubscribe From: KTextinction65Ma@....... Date: Sun, 12 Aug 2001 17:15:24 EDT __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: geophone for urban search work From: Bob Fryer bfryer@............ Date: Sun, 12 Aug 2001 20:55:08 -0700 Hello Rick, Water departments have a rather simple device used to precisely locate leaks before digging up a street. I think they also call it a geo-phone. It worked very well the only time that I used one. Configuration was like a giant stethoscope. Didn't appear to have any electronics. Bob >Rick, > >I'm not sure if a geophone would be good for this type of thing, >maybe....I'm CCing the PSN mailing list. Maybe someone on the list has some >ideas for you. > >PSN'ers, please CC Rick at seadog@....... since he is not on the list. > >-Larry Cochrane >Redwood City, PSN > > >----- Original Message ----- >From: "Rick Howard" >To: >Sent: Sunday, August 12, 2001 12:43 AM >Subject: geophone for urban search work > > >> Larry, >> >> Please advise whether you feel a geophone like the Mark >> Products L10B you have for sale might prove useful as >> a device to detect a person tapping on a collapsed structure >> when buried under rubble. >> >> I'm a Technical Search Specialist for one of the FEMA >> Urban Search & Rescue Task Forces, and we use a >> sophisticated device (http://www.delsar.com) as a person >> locator, but this equipment is expensive and limited as >> far as access for training. How might a geophone work as >> as a detector if someone was tapping on a structure (pipe, >> concrete, etc) 20-100 feet away? The general frequency >> range the Delsar unit calls for is 1-3000 Hz. I'd love >> to buy a geophone to experiment with. I can solder circuits >> pretty well, if you can recommend a circuit to go with it. >> >> Any advice would be appreciated. I serve in search and >> rescue as a volunteer; you'll incur no liability in >> giving me your recommendation - I'm just looking to >> experiment with other available, cheaper tools in a >> quest to do my search job better. >> >> Thanks - >> >> Rick Howard >> Tech Search Specialist >> California Task Force 3, Menlo Park ----- earthquake WARNING research ----- --- animals, people, scientific evidence --- --- http://www.earthquakewarning.org --- __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: 1HZ Geophones From: "Larry Cochrane" cochrane@.............. Date: Tue, 14 Aug 2001 19:26:13 -0700 All, William Ott from the Weston Observatory in Weston MA contacted me the other day in regards to trading some of my equipment (A/D, Amp boards and GPS system) for some of their unused geophones. Below are links to pictures of the sensors as well as manuals in pdf format. I told William, who is on the PSN-L list, that I could trade two systems for the HS-10-1b and HS-10-1 now and that I would send out an email message to the list to see if anyone is interested in the remaining 6 vertical sensors. He would like to have four systems from me and he has 12 sensors available. The cost will be $180.00 + shipping for each of the vertical sensors. I will need to sell three sensors to be able to supply a complete system to William. If interested please mail me and William. Thanks, -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "William Ott" To: "Larry Cochrane" Sent: Tuesday, August 07, 2001 11:38 AM Subject: Re: seismometers > > > Larry, > > I have finally gotten out some of our surplus 1 Hz seismometers and tested them > to make certain that they work. > I think I could use as many as four sets of your boards, each with a seismic > amplifier/filter board (3 channel) plus power supply, a PSN-ADC-16 analog to > digital card, and a GPS timing system interface board with antenna and power > supply. > > I would be interested in trading you the following sets of seismometers (one set > of seismometer for a set of boards): > > 1. A set of HS-10-1 instruments (2 horizontal and 1 vertical) with 50,000-ohm > coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10A.jpg > 2. A set of HS-10-1B instruments (2 horizontal and 1 vertical) with 50,000-ohm > coils and calibration coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10B.jpg > 3. A set of three vertical EV-17 instruments with 5,000-ohm coils and > calibration coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/EV17.jpg > 4. A set of three vertical HS-10-1/A instruments with 50,000-ohm main coils, > calibration coils and pressure cases. (The pressure cases are somewhat rusty > but can be cleaned up) See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10C.jpg > > I have also scanned information on these seismometers into PDF format that you > might find useful. > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/ev17.pdf > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/hs10.pdf > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10_1a.pdf > > > If you are interested in trading for these instruments let me know. > > > William Ott > Weston Observatory > Boston college > ottwi@...... > > > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Mt Rainier From: Seisguy@....... Date: Wed, 15 Aug 2001 03:34:02 EDT By morning I'm sure we'll know more....Mike Emergency Supply Center wrote: > We have just been notified (10:34PM) of a major Lahar Flow off the side of > Mt. Rainier.=A0 The Lahar alarms in Orting and Sumner have gone off to sta= rt > evacuation of the valleys and low-lying areas.=A0 Rocks,=A0 trees and othe= r > debris are flowing heavily and have gone through and over several > campgrounds.=A0 EOC has been activated. > > More as it comes in. By morning I'm sure we'll= know more....Mike

Emergency Supply Center wrote:

> We have just been notified (10:34PM) of a major Lahar Flow off the=20= side of
> Mt. Rainier.=A0 The Lahar alarms in Orting and Sumner have gone off= to start
> evacuation of the valleys and low-lying areas.=A0 Rocks,=A0 trees a= nd other
> debris are flowing heavily and have gone through and over several
> campgrounds.=A0 EOC has been activated.
>
> More as it comes in.
Subject: RE: 1HZ Geophones From: Jack Ivey ivey@.......... Date: Wed, 15 Aug 2001 09:31:20 -0400 Larry, William, I am interested in one of the verticals - what do I need to do? Thanks, Jack Ivey -----Original Message----- From: Larry Cochrane [mailto:cochrane@............... Sent: Tuesday, August 14, 2001 10:26 PM To: psn-l@.............. Subject: 1HZ Geophones All, William Ott from the Weston Observatory in Weston MA contacted me the other day in regards to trading some of my equipment (A/D, Amp boards and GPS system) for some of their unused geophones. Below are links to pictures of the sensors as well as manuals in pdf format. I told William, who is on the PSN-L list, that I could trade two systems for the HS-10-1b and HS-10-1 now and that I would send out an email message to the list to see if anyone is interested in the remaining 6 vertical sensors. He would like to have four systems from me and he has 12 sensors available. The cost will be $180.00 + shipping for each of the vertical sensors. I will need to sell three sensors to be able to supply a complete system to William. If interested please mail me and William. Thanks, -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "William Ott" To: "Larry Cochrane" Sent: Tuesday, August 07, 2001 11:38 AM Subject: Re: seismometers > > > Larry, > > I have finally gotten out some of our surplus 1 Hz seismometers and tested them > to make certain that they work. > I think I could use as many as four sets of your boards, each with a seismic > amplifier/filter board (3 channel) plus power supply, a PSN-ADC-16 analog to > digital card, and a GPS timing system interface board with antenna and power > supply. > > I would be interested in trading you the following sets of seismometers (one set > of seismometer for a set of boards): > > 1. A set of HS-10-1 instruments (2 horizontal and 1 vertical) with 50,000-ohm > coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10A.jpg > 2. A set of HS-10-1B instruments (2 horizontal and 1 vertical) with 50,000-ohm > coils and calibration coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10B.jpg > 3. A set of three vertical EV-17 instruments with 5,000-ohm coils and > calibration coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/EV17.jpg > 4. A set of three vertical HS-10-1/A instruments with 50,000-ohm main coils, > calibration coils and pressure cases. (The pressure cases are somewhat rusty > but can be cleaned up) See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10C.jpg > > I have also scanned information on these seismometers into PDF format that you > might find useful. > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/ev17.pdf > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/hs10.pdf > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10_1a.pdf > > > If you are interested in trading for these instruments let me know. > > > William Ott > Weston Observatory > Boston college > ottwi@...... > > > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Geological fun From: jmhannon@........ Date: Wed, 15 Aug 2001 09:17:01 -0500 (CDT) http://www.wimble.org/preventionhome2.shtml Just found this web site and thought it might be interesting. Jim Hannon http://soli.inav.net/~jmhannon/ 42,11.90N,91,39.26W WB0TXL __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: 1HZ Geophones From: GeE777@....... Date: Wed, 15 Aug 2001 10:52:19 EDT Hello, I would like a 1HZ geophone. Tell me how to get one. George Erich Geophysical Exploration Consultant P. O. Box 2011, Norwalk, CA 90651, U. S. A Phone (562) 868-6013 e-mail GeE777@....... 33 53.90N 118 04.53W http://hometown.aol.com/gee777/myhomepage/profile.html __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Mt Rainier From: mprice@........ Date: Wed, 15 Aug 2001 07:58:36 -0700 Seattle Post-Intelligencer article about glacier outburst on Rainier: http://seattlep-i.nwsource.com/local/35282_lahar15.shtml Mike Price Seisguy@....... wrote: > > By morning I'm sure we'll know more....Mike > > Emergency Supply Center wrote: > > > We have just been notified (10:34PM) of a major Lahar Flow off the side of > > Mt. Rainier. The Lahar alarms in Orting and Sumner have gone off to start > > evacuation of the valleys and low-lying areas. Rocks, trees and other > > debris are flowing heavily and have gone through and over several > > campgrounds. EOC has been activated. > > > > More as it comes in. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Geophone info. needed From: "D. Hill" n0ssy@......... Date: Wed, 15 Aug 2001 09:28:08 -0600 I have seen the message about the geophones that are for sale. My knowledge of geophones is equal to my knowledge of the women physic. I currently have a homebrew Lehman. With it I can record any 5.8 event world wide. How does one of the geophones compare with a lehman? Regards, Dewayne Hill __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: from angel From: "angel@chiriqui" angel@............ Date: Wed, 15 Aug 2001 18:10:02 -0400 Hello Mauro, How are you!! I haven't heard from you in a while! Everything here is fine and I'm getting ready for my long trip. Regards, angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: hit reply to quickly!! From: "angel@chiriqui" angel@............ Date: Wed, 15 Aug 2001 18:23:19 -0400 Hello PSN list, I should be more careful about hitting reply, that last message was no meant for the list. Sorry! angel __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Geological fun From: "Larry Cochrane" cochrane@.............. Date: Wed, 15 Aug 2001 17:33:56 -0700 I love it! Thanks for posting the link to the list. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: To: Sent: Wednesday, August 15, 2001 7:17 AM Subject: Geological fun > http://www.wimble.org/preventionhome2.shtml > Just found this web site and thought it might be interesting. > > Jim Hannon > http://soli.inav.net/~jmhannon/ > 42,11.90N,91,39.26W > WB0TXL > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Geophone info. needed From: Larry Cochrane cochrane@.............. Date: Wed, 15 Aug 2001 19:28:01 -0700 Dewayne,

Geophones are used to record local events. 1 Hz sensors will pick up the P wave of a teleseismic event but other then that they do a bad job at recording the lower frequence waves observed from distant event. See my geophone page here http://www.seismicnet.com/geophone/index.html for more information

-Larry Cochrane
Redwood City, PSN

At 09:28 AM 8/15/2001 -0600, you wrote:
I have seen the message about the geophones that are for sale.

My knowledge of geophones is equal to my knowledge of the women
physic.

I currently have a homebrew Lehman. With it I can record any
5.8 event world wide. How does one of the geophones compare with
a lehman?

Regards, Dewayne Hill
__________________________________________________________

Public Seismic Network Mailing List (PSN-L)

ormation.
Subject: Telemetry Decoder From: "S Shufflebotham" cellectronic@.............. Date: Wed, 15 Aug 2001 19:56:30 +0100 Hi All, Does anybody have a circuit diagram or know where i can find one for a = 600 Hz tone decoder, weather it be a PLL design or dedicated frequency = to voltage converter is not important. I assume most analog telemetry = links use the method of a varying tone relative to seismic signals as is = the case with my setup, I am currently using a tuned coil for a = freq/volt converter and are looking into other possibilities of = achieving this. Regards Steve
Hi All,
Does anybody have a circuit diagram or = know where i=20 can find one for a 600 Hz tone decoder, weather it be a PLL design or = dedicated=20 frequency to voltage converter is not important. I assume  most = analog=20 telemetry links use the method of a varying tone relative to seismic = signals as=20 is the case with my setup, I am currently using a tuned coil for  a = freq/volt converter and are looking into other possibilities of  = achieving=20 this.  Regards Steve
Subject: Re: Geological fun From: John Hernlund hernlund@............ Date: Wed, 15 Aug 2001 21:21:48 -0700 Excellent stuff!!! I think I'll start a chapter here in LA... Larry Cochrane wrote: > I love it! Thanks for posting the link to the list. > > -Larry Cochrane > Redwood City, PSN > > ----- Original Message ----- > From: > To: > Sent: Wednesday, August 15, 2001 7:17 AM > Subject: Geological fun > > > http://www.wimble.org/preventionhome2.shtml > > Just found this web site and thought it might be interesting. John Hernlund Department of Earth and Space Sciences University of California, Los Angeles http://geodyn.ess.ucla.edu/~hernlund/ hernlund@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: from angel From: "Mauro Mariotti" mariottim@............ Date: Thu, 16 Aug 2001 09:24:48 +0200 Hello Angel, i'm here, simply resting a little during the summer... Good you have your systems ready! Any news from Arie or University of Costa Rica? I read the mail from/to Jens and others... A local observatory asked to me to evaluate the design of that kind of standalone seismic station i told you some weeks ago, do you remember? If the thing will go on we'll have a portable seismic station pc-based made with industrial equipments... I'll keep you informed. During your trip do you will be reacheble by email? Regards Mauro ----- Original Message ----- From: "angel@chiriqui" To: "Mauro Mariotti" Sent: Thursday, August 16, 2001 12:10 AM Subject: from angel > Hello Mauro, > > How are you!! > > I haven't heard from you in a while! > > Everything here is fine and I'm getting ready for my long trip. > > Regards, > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: hit reply to quickly!! From: "Mauro Mariotti" mariottim@............ Date: Thu, 16 Aug 2001 14:36:17 +0200 Sorry, to ALL PSN. I and angel developed an insane habit to click Reply Button too much quick! It's at least the second time i trapped in this mistake! Sorry for this... ----- Original Message ----- From: "angel@chiriqui" To: "Mauro Mariotti" Sent: Thursday, August 16, 2001 12:23 AM Subject: hit reply to quickly!! > Hello PSN list, > > I should be more careful about hitting reply, that last message was no > meant for the list. Sorry! > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Fw: geophone for urban search work From: "Larry Cochrane" cochrane@.............. Date: Thu, 16 Aug 2001 20:55:06 -0700 From John Lahr. -Larry ----- Original Message ----- From: "The Lahrs" To: ; Sent: Thursday, August 16, 2001 8:33 PM Subject: Re: geophone for urban search work > (Larry, could you forward this to the PSN? Thanks!) > > Hi Rick, > > I don't think a 1 Hz geophone would be the best tool to pick up a tapping > noise. > You might want to use a less expensive 4.5 or 8 Hz geophone or even a > microphone. In 1992 I used microphones to locate neighborhood gunshots. > The recording system digitized the signals at 2,000 samples per second. > A high sampling rate would also be required for a your search and rescue > system, both to record the high frequencies and to allow very accurate > timing for locating the source with three sensors. > > There is information on the gunshot system here: > > > Cheers, > John > At 02:29 PM 8/12/2001 , you wrote: > >Rick, > > > >I'm not sure if a geophone would be good for this type of thing, > >maybe....I'm CCing the PSN mailing list. Maybe someone on the list has some > >ideas for you. > > > >PSN'ers, please CC Rick at seadog@....... since he is not on the list. > > > >-Larry Cochrane > >Redwood City, PSN > > > > > >----- Original Message ----- > >From: "Rick Howard" > >To: > >Sent: Sunday, August 12, 2001 12:43 AM > >Subject: geophone for urban search work > > > > > > > Larry, > > > > > > Please advise whether you feel a geophone like the Mark > > > Products L10B you have for sale might prove useful as > > > a device to detect a person tapping on a collapsed structure > > > when buried under rubble. > > > > > > I'm a Technical Search Specialist for one of the FEMA > > > Urban Search & Rescue Task Forces, and we use a > > > sophisticated device (http://www.delsar.com) as a person > > > locator, but this equipment is expensive and limited as > > > far as access for training. How might a geophone work as > > > as a detector if someone was tapping on a structure (pipe, > > > concrete, etc) 20-100 feet away? The general frequency > > > range the Delsar unit calls for is 1-3000 Hz. I'd love > > > to buy a geophone to experiment with. I can solder circuits > > > pretty well, if you can recommend a circuit to go with it. > > > > > > Any advice would be appreciated. I serve in search and > > > rescue as a volunteer; you'll incur no liability in > > > giving me your recommendation - I'm just looking to > > > experiment with other available, cheaper tools in a > > > quest to do my search job better. > > > > > > Thanks - > > > > > > Rick Howard > > > Tech Search Specialist > > > California Task Force 3, Menlo Park __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Telemetry Decoder From: ChrisAtUpw@....... Date: Fri, 17 Aug 2001 13:49:16 EDT In a message dated 16/08/01, cellectronic@.............. writes: > Does anybody have a circuit diagram or know where I can find one for a 600 > Hz tone decoder, weather it be a PLL design or dedicated frequency to > voltage converter is not important. I assume most analogue telemetry links > use the method of a varying tone relative to seismic signals as is the case > with my setup, I am currently using a tuned coil for a freq/volt converter > Dear Steve, I assume that you wish to output a tone to your radio link which is a frequency analogue of the input voltage and then recover a voltage from the receiver. (There are standard amateur radio circuits for providing for frequency shift keying of digital signals) If you look up the applications information in the LM331 Voltage to Frequency Converter and the LM2917 Frequency to Voltage Converter data sheets, you will find standard 'precision' circuits available. If you wish to use a phase lock loop to give some immunity from RFI, I suggest that you consider using a CD4046 PLL for both the oscillator and decoder. The input voltage / frequency output of the 4046 is vaguely S shaped due to the characteristic of the input source follower FET and the source resistor. This can be eliminated using a CA3130 opamp. If you put the input voltage onto the + in p3 of the opa, the opa output p6 onto the Vin p9 of the 4046 and the -in p2 of the opa onto the junction of the source resistor and 4046 p11, this will force the input voltage / current / frequency characteristic to be dead linear. The improvement is considerable. Have you noted the EV-17 1 Hz seis mentioned in Larry's message of 15/08/01? Regards, Chris Chapman In a message dated 16/08/01, cellectronic@.............. writes:

Does a nybody have a circuit diagram or know where I can find one for a 600
Hz tone decoder, weather it be a PLL design or dedicated frequency to
voltage converter is not important. I assume most analogue telemetry links
use the method of a varying tone relative to seismic signals as is the case
with my setup, I am currently using a tuned coil for a freq/volt converter
and are looking into other possibilities of achieving this.


Dear Steve,

      I assume that you wish to output a tone to your radio link which is a
frequency analogue of the input voltage and then recover a voltage from the
receiver. (There are standard amateur radio circuits for providing for
frequency shift keying of digital signals) If you look up the applications
information in the LM331 Voltage to Frequency Converter and the LM2917
Frequency to Voltage Converter data sheets, you will find standard
'precision' circuits available.

      If you wish to use a phase lock loop to give some immunity from RFI, I
suggest that you consider using a CD4046 PLL for both the oscillator and
decoder. The input voltage / frequency output of the 4046 is vaguely S shaped
due to the characteristic of the input source follower FET and the source
resistor. This can be eliminated using a CA3130 opamp. If you put the input
voltage onto the + in p3 of the opa, the opa output p6 onto the Vin p9 of the
4046 and the -in p2 of the opa onto the junction of the source resistor and
4046 p11, this will force the input voltage / current / frequency
characteristic to be dead linear. The improvement is considerable.

      Have you noted the EV-17 1 Hz seis mentioned in Larry's message of
15/08/01?

      Regards,

      Chris Chapman Subject: Geophones From: Casey Crane ogzax@........ Date: Fri, 17 Aug 2001 12:11:02 -0700 Hi all, Since I've been seeing more Geophone talk lately, the following place (as of last month) is selling them for about $7.95 ea: www.gatewayelex.com Casey ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Fw: geophone for urban search work From: james fisher kd6iwd@......... Date: Fri, 17 Aug 2001 12:11:29 -0700 (PDT) The piezo disk transducer is a suitable device for urban search work where it is necessary to listen for tapping or other noises in collapsed buildings. The transducer when coupled to an op27 audio amp and a 386 power amp will yield incredible sensitivity. In an experiment i conducted, it was easy to detect the noise caused by merely toutching a countertop with one finger. The countertop had a piezo disk transducer attached to it. The piezo disk had a thumbtack glued to it and no weight was placed on the piezo disk. The head of the thumbtack was glued to the piezo side of the disk. This setup is also sensitive to ambient noise and will feed back if the earphones used to listen are within 10 feet of the pickup. Note that you must use earphones with good audio isolation because the sound from the earphone will feed back. Loudspeakers will not work. The electronics for this application could be put together very inexpensively less than $25. Another approach for an amplifier is to tap into an inexpensive amplifier on a tape player or other similar consumer device. If you can lift the leads going to the read head on a tape player you should be able to feed the piezo disk output directly into the player. If the tape drive motor leads are clipped off the batteries will last much longer. best regards james fisher --- Larry Cochrane wrote: > From John Lahr. -Larry > > ----- Original Message ----- > From: "The Lahrs" > To: ; > Sent: Thursday, August 16, 2001 8:33 PM > Subject: Re: geophone for urban search work > > > > (Larry, could you forward this to the PSN? > Thanks!) > > > > Hi Rick, > > > > I don't think a 1 Hz geophone would be the best > tool to pick up a tapping > > noise. > > You might want to use a less expensive 4.5 or 8 Hz > geophone or even a > > microphone. In 1992 I used microphones to locate > neighborhood gunshots. > > The recording system digitized the signals at > 2,000 samples per second. > > A high sampling rate would also be required for a > your search and rescue > > system, both to record the high frequencies and to > allow very accurate > > timing for locating the source with three sensors. > > > > There is information on the gunshot system here: > > > > > > Cheers, > > John > > At 02:29 PM 8/12/2001 , you wrote: > > >Rick, > > > > > >I'm not sure if a geophone would be good for this > type of thing, > > >maybe....I'm CCing the PSN mailing list. Maybe > someone on the list has > some > > >ideas for you. > > > > > >PSN'ers, please CC Rick at seadog@....... since > he is not on the list. > > > > > >-Larry Cochrane > > >Redwood City, PSN > > > > > > > > >----- Original Message ----- > > >From: "Rick Howard" > > >To: > > >Sent: Sunday, August 12, 2001 12:43 AM > > >Subject: geophone for urban search work > > > > > > > > > > Larry, > > > > > > > > Please advise whether you feel a geophone like > the Mark > > > > Products L10B you have for sale might prove > useful as > > > > a device to detect a person tapping on a > collapsed structure > > > > when buried under rubble. > > > > > > > > I'm a Technical Search Specialist for one of > the FEMA > > > > Urban Search & Rescue Task Forces, and we use > a > > > > sophisticated device (http://www.delsar.com) > as a person > > > > locator, but this equipment is expensive and > limited as > > > > far as access for training. How might a > geophone work as > > > > as a detector if someone was tapping on a > structure (pipe, > > > > concrete, etc) 20-100 feet away? The general > frequency > > > > range the Delsar unit calls for is 1-3000 Hz. > I'd love > > > > to buy a geophone to experiment with. I can > solder circuits > > > > pretty well, if you can recommend a circuit to > go with it. > > > > > > > > Any advice would be appreciated. I serve in > search and > > > > rescue as a volunteer; you'll incur no > liability in > > > > giving me your recommendation - I'm just > looking to > > > > experiment with other available, cheaper tools > in a > > > > quest to do my search job better. > > > > > > > > Thanks - > > > > > > > > Rick Howard > > > > Tech Search Specialist > > > > California Task Force 3, Menlo Park > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email > PSN-L-REQUEST@.............. with > the body of the message (first line only): > unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: GPS Group Buy From: "Ron Westfall" westfall@........ Date: Fri, 17 Aug 2001 13:36:22 -0700 Hi Larry Have you had a chance to send my two systems? Ron > -----Original Message----- > From: psn-l-request@.............. > [mailto:psn-l-request@................. Behalf Of Larry Cochrane > Sent: Saturday, August 04, 2001 3:07 PM > To: psn-l@.............. > Subject: GPS Group Buy > > > All, > > The GPS receivers and antennas arrived on Friday. For the people who already > paid I will send out the orders on Monday. If you placed an order and have > not sent in your payment, now would be a good time to do it. > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: An Introduction to Earthquakes by Charles J. Ammon, SLU & PSU professor From: Jim ODonnell jimo17@........ Date: Mon, 20 Aug 2001 22:56:22 -0700 A very good read and what you always wanted to know about seismology.......The undergraduate course notes (EAS 193) taught at Saint Louis University could easily be a best seller! http://www.eas.slu.edu/People/CJAmmon/ Home page Saint Louis University http://www.eas.slu.edu/People/CJAmmon/HTML/Classes/IntroQuakes/ Internet class notes - An Introduction to Earthquakes - http://www.eas.slu.edu/People/RBHerrmann/Courses/EASA130/IntroQuakes.Ammo n.pdf 15Mb of PDF file, 209 pages
A very good read and what you always wanted to know about=20 seismology.......The undergraduate course notes (EAS 193) taught at Saint = Louis=20 University could easily be a best seller!
http://www.eas.slu.edu/= People/CJAmmon/ =20 Home page Saint Louis University
= http://www.eas.slu.edu/People/CJAmmon/HTML/Classes/IntroQuakes/ =20 Internet class notes

- An Introduction to Earthquakes=20 -

http://www.eas.slu.edu/People/RBHerrmann/Courses/= EASA130/IntroQuakes.Ammon.pdf
15Mb of PDF file, 209 pages
Subject: Large event From: Dave Nelson davenn@.............. Date: Tue, 21 Aug 2001 18:11:19 +1000 large event jst nth of new zealand jst come in 01/08/21 0655 UTC M6.5 - 7.0 region looks like kermadecs area Dave Dave A. Nelson ZL4TBN 13 Monash Rd., Gladesville, (Sydney) 2111 NSW, Australia http://www.seismicnet.com/dave/home.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Sean's silence From: sean@........... Date: Tue, 21 Aug 2001 21:05:36 -0500 (CDT) Hi, I'm a friend of SEan Morrissey, and if you've been wondering about his silence this summer, it's because he's been in the hospital since early June. He is recovering well and hopes to be home in a few weeks. He has lots of email to catch up on, but I'm sure he'll get in touch with everyone who's been trying to contact him! Laurie hausmann@........... __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Sean's silence From: "Larry Cochrane" cochrane@.............. Date: Tue, 21 Aug 2001 20:01:12 -0700 Laurie, Thank you for the information. Please give Sean out best regards. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: To: Sent: Tuesday, August 21, 2001 7:05 PM Subject: Sean's silence > > Hi, I'm a friend of SEan Morrissey, and if you've been wondering about > his silence this summer, it's because he's been in the hospital since > early June. He is recovering well and hopes to be home in a few weeks. > He has lots of email to catch up on, but I'm sure he'll get in touch > with everyone who's been trying to contact him! > > Laurie > hausmann@........... __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: "experience" a 'quake From: BOB BARNS roybar@........ Date: Wed, 22 Aug 2001 10:18:40 -0400 Hi gang, A friend found this-- http://www.passcal.nmt.edu/~bob/passcal/earthquake.htm The reference page page is good and has some interesting snapshots of seismic studies being performed. Best wishes to Sean-Thomas, a most valueable contributer to this list. Bob Barns __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: WinOncore From: "Tom Frey" tfreyis@........ Date: Fri, 24 Aug 2001 22:09:24 -0700 I have seen several references to WinOncore and TAC32 and their use with the Motorola GPS Units from Larry. I have both but have been unable to get anything from WinOncore. TAC32 works out of the box so to speak . Could someone maybe point me in the right direction, I have tried everything I have read or thought about with no success. I read that with WinOncore you could also use the Motorola unit with Mapping software for a visual display of position. THat's a long long way away. thanks tom tfreyis@........ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: WinOncore From: "Larry P. Thomas wa0gwa" lpthomas@......... Date: Sun, 26 Aug 2001 19:58:46 -0500 Try switching back and forth between Motorola Format and NEMEA. If OnCore is in MOT Format you need 9600 Baud and if in NMEA you need 4800 Baud. I had a little trouble getting mine to play with WinOnCore at first. Later Larry Thomas At 10:09 PM 8/24/2001 -0700, you wrote: >I have seen several references to WinOncore and TAC32 and their use with the >Motorola GPS Units from Larry. I have both but have been unable to get >anything from WinOncore. TAC32 works out of the box so to speak . Could >someone maybe point me in the right direction, I have tried everything I >have read or thought about with no success. I read that with WinOncore you >could also use the Motorola unit with Mapping software for a visual display >of position. THat's a long long way away. >thanks > >tom > >tfreyis@........ > >__________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email PSN-L-REQUEST@.............. with >the body of the message (first line only): unsubscribe >See http://www.seismicnet.com/maillist.html for more information. - Imagine it / Achieve it - Dream it / Become it - Larry P. Thomas wa0gwa voice : 1 913 888-0282 Krell Technologies fax : 8960 Bond pager : 1 913 617-HELP Overland Park, KS www.krell.com 66214-1722 USA lpthomas@......... __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: New version of SDR From: "Larry Cochrane" cochrane@.............. Date: Sun, 26 Aug 2001 22:41:52 -0700 All, I released a new version of SDR the other day. You can download version 4.1 here http://www.seismicnet.com/sdrdocs/sdr.htm. There is only one new feature in this release. When the channel goes into an alarm state the trace for the channel will change to a different color while it remains in the alarm state. The color can be controlled under the Trace Color menu item for each channel. You now need to input two color numbers. The first one is the normal color and the second the alarm state color. Regards, Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: seismograph on ebay From: BOB BARNS roybar@........ Date: Mon, 27 Aug 2001 10:58:43 -0400 Hi gang, Ebay currently offers an "Esterline Angus Seismograph". http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1459773664 The auction ends 9/5 Bob __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: seismograph on ebay From: Doug Crice dcrice@............ Date: Mon, 27 Aug 2001 08:23:14 -0700 It seems that many instruments with any type of chart recorder get called a "seismograph", even when they have a paper chart that says something like -20 to 100 deg C. I'm sure this is one such instrument. BOB BARNS wrote: > > Hi gang, > Ebay currently offers an "Esterline Angus Seismograph". > > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1459773664 > > The auction ends 9/5 > Bob > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- Doug Crice http://www.georadar.com 19623 Via Escuela Drive phone 408-867-3792 Saratoga, California 95070 USA fax 408-867-4900 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: seismograph on ebay From: CapAAVSO@....... Date: Mon, 27 Aug 2001 16:22:47 EDT In a message dated 8/27/01 4:32:19 PM GMT Daylight Time, dcrice@............ writes: << It seems that many instruments with any type of chart recorder get called a "seismograph", even when they have a paper chart that says something like -20 to 100 deg C. I'm sure this is one such instrument. >> Hi Doug and Bob, I checked the picture and it is definitely an Esterline Angus strip chart recorder. I once used one like it to record the output of a solar flare detector running at 3/4 inch/hr. It could also be used to record the output of a magnetometer or similar device. You can probably get chart paper for it from "Graphic Controls" which I believe is in Rochester, NY. I will not be bidding on it because I already have one. If you have a use for a strip chart recorder and can get this one cheap it should be a pretty good deal. Cap w2dnx __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: seismograph on ebay From: RADIOTEL@....... Date: Tue, 28 Aug 2001 00:25:20 EDT If you go to there store site on EBay, you can obtain a more complete set of pictures of the EsterLine-Angus chart recorder which is connected to a Leeds Seismometer. There are two photos of the seismometer, a closeup showing the damping adjustment and coil lock and the other a full picture of the unit. Hope this is helpful to anyone wanting or needing a seismometer and recorder. Jim Allen If you go to there store site on EBay, you can obtain a more complete set of
pictures of the EsterLine-Angus chart recorder which is connected to a Leeds
Seismometer.  There are two photos of the seismometer, a closeup showing the
damping adjustment and coil lock and the other a full picture of the unit.  
Hope this is helpful to anyone wanting or needing a seismometer and recorder.
Jim Allen Subject: ..earthquake june 23 From: Edgard Gonzales Zenteno egz@............ Date: Mon, 27 Aug 2001 23:30:44 -0500 All, I reside in the city of Arequipa, Peru, place of the last happened earthquake June 23. It is mentioned that this earthquake was not only an event, but 2 and until 3 events that happened simultaneously or they were unchained up to 3 events, of there the value of the magnitude Mw 8.4. I would like to know those that have registered this event, if they can determine other phases different from arrivals in the main event. Likewise if they had other characteristics of this earthquake, since a complex event that has involved a great area. Thanks. Edgard Gonzales Geophysical Institute National University of San Agustin Arequipa-Peru __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Fw: Seismic sensors From: "Larry Cochrane" cochrane@.............. Date: Tue, 28 Aug 2001 22:44:39 -0700 All, I just received this message. Does anyone know anything about MET (molecular-electronic transfer) seismometers? I will be contacting them to see how much they cost. -Larry Cochrane ----- Original Message ----- From: The Center for Molecular Electronics To: cochrane@.............. Sent: Tuesday, August 28, 2001 10:30 PM Subject: Seismic sensors Dear Seismologist! We know that you're interested in seismology. We believe that this information conserning new seismic sensors may be interesting for you. Please, pay attention to new unique MET (molecular-electronic transfer) seismometers developed in Center for Molecular Electronic specially for using by amateur seismologists and for educational purposes. These instruments use innovative molecular-electronic technology and provide professional quality seismic records for incomparable very low price. For more details, please, visit our web-page ( http://cme.ffke.mipt.ru ). About us. The Center for Molecular Electronics is a scientific organization. Our field of interest includes transportation phenomena in liquids and solid states, interfacial processes, electrochemistry and applications. MET technology is a result of more than a 15 years scientific and technical efforts. We continue our research programs and new models of MET sensors are now under development. If you have any questions or comments, please contact us (cme@.................. Best regards, Prof. Vladimir A. Kozlov, Head of Center for Molecular Electronics, Department of Physical and Quantum Electronics, Moscow Institute of Physics and Technology 9, Institutskii per., Dolgoprudnuy, Moscow reg, Russia, 141700 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Fw: Seismic sensors From: peaches@............ (Donna Whitaker) Date: Wed, 29 Aug 2001 08:28:17 -1000 (HST) Hi Larry and all. I also recieved that ad and sent them an email asking for a price list and catalog. Heres what they sent me. Thank you for your attention to our instruments. The following are the prices for our commercial products in small quantities: Regular Models: CME2023 - 2300 USD CME2123 - 2800 USD Rotational Sensors: METR01 - 450 USD METR03 - 1050 USD Amateur Models: ASMET1V - 850 USD ASMET13 - 1800 USD ASMET2V - 1000 USD ASMET23 - 2100 USD All prices do not include delivery cost and custom expenses. Some options, such as low-power and borehole versions may increase the above listed prices by $100-$200. Delivery time is 2-3 months. At the moment we do not have a printed product catalog of our seismometers. Please, contact us for more infromation. Regards, Kozlov Vladimir. At these not so amateur prices, I think I will pass, but other PSN'ers might be interested. Sure would like to try out one of their longer period models tho. Aloha Tony >All, > >I just received this message. Does anyone know anything about MET >(molecular-electronic transfer) seismometers? I will be contacting them to >see how much they cost. > >-Larry Cochrane > > >----- Original Message ----- >From: The Center for Molecular Electronics >To: cochrane@.............. >Sent: Tuesday, August 28, 2001 10:30 PM >Subject: Seismic sensors > > >Dear Seismologist! > > We know that you're interested in seismology. We believe that this >information >conserning new seismic sensors may be interesting for you. Please, pay >attention to >new unique MET (molecular-electronic transfer) seismometers developed in >Center >for Molecular Electronic specially for using by amateur seismologists and >for educational >purposes. These instruments use innovative molecular-electronic technology >and provide >professional quality seismic records for incomparable very low price. For >more >details, please, visit our web-page ( http://cme.ffke.mipt.ru ). > > About us. The Center for Molecular Electronics is a scientific >organization. Our field of >interest includes transportation phenomena in liquids and solid states, >interfacial processes, >electrochemistry and applications. MET technology is a result of more than a >15 years >scientific and technical efforts. We continue our research programs and new >models of >MET sensors are now under development. > >If you have any questions or comments, please contact us >(cme@.................. > >Best regards, > Prof. Vladimir A. Kozlov, > Head of Center for Molecular Electronics, > Department of Physical and Quantum Electronics, > Moscow Institute of Physics and Technology > 9, Institutskii per., Dolgoprudnuy, > Moscow reg, Russia, 141700 > >__________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email PSN-L-REQUEST@.............. with >the body of the message (first line only): unsubscribe >See http://www.seismicnet.com/maillist.html for more information. > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: PMD or MET seismometer & PEPP, USESN, PSN, NESN From: Jim ODonnell jimo17@........ Date: Wed, 29 Aug 2001 21:53:57 -0700 Hi All- A little more info on the PMD/MET seismometer. I first heard of it 2-3 years ago, as it was one of the PEPP (Princeton Earth Physics Program) http://lasker.princeton.edu/education.html seismometers along with the Guralp. I believe ~9 of the ~90 PEPP seismometers are the PMD type. I always called it the chemical seis for lack of a better name. The early PMD2's that PEPP has had, have not performed well. However, Tom Owens's South Carolina group, SCEPP, has had a good experience with the newer three component PMD machines. They have purchased around 40 3-component PMDs. At this time you cannot run SCREAM (Guralp's software) with these machines, though. I am not sure about WinQuake- As good as Scream is, many PEPP people prefer WinQuake!!!!! PMD or MET: You can see more about it at: http://www.eentec.com/PMD/pmdproductpage.htm and MET Theory at: http://www.eentec.com/PMD/ELECTROCHEMICA-1.doc US Educational Seismic Network (USESN): BTW, I attended the IRIS annual meeting in June and volunteered to serve on the US Educational Seismic Network (USESN) Committee. It consists of 9 states, which have their own high school seismic networks, PEPP related, and the PSN. I believe Gary Simila, seismologist from Cal State Northridge, suggested PSN be part of the USESN. Since I was familiar with the PSN, I seconded the motion and described many of the PSN activities. The main focus of the USESN is to effectively promote programs for educational seismographs in schools. No buddy does it better than you guys! Nevada Educational Seismic Network (NESN): I am working on putting together a 20 site network for Nevada high schools which I hope to have up and running by the beginning of 2002. Funding comes from the Nevada Earthquake Safety Council and the Nevada Public Agency Insurance Pool. The planning has been going on for over a year, and much of the design and components has come from the PSN and Larry Cochrane. These sites will be much cheaper per site (~$500) than the PEPP (~$2500) sites.....Jim Jim O'Donnell UNLV Adjunct Research Associate Geoscience Dept. & Engineering Geophysics Lab.
Hi All- A little more info on the PMD/MET seismometer.  I first = heard=20 of it 2-3 years ago, as it was one of the PEPP (Princeton Earth Physics = Program)=20 http://lasker.princeton= ..edu/education.html=20 seismometers along with the Guralp.  I believe ~9 of the ~90 = PEPP=20 seismometers are the PMD type.  I always called it the chemical seis = for=20 lack of a better name.  The early PMD2's that PEPP has had, have not=20 performed well.  However, Tom Owens's South Carolina group, SCEPP, has= had=20 a good experience with the newer three component PMD machines.  They = have=20 purchased around 40 3-component PMDs.  At this time you cannot run = SCREAM=20 (Guralp's software) with these machines, though. I am not sure about = WinQuake-=20 As good as Scream is, many PEPP people prefer WinQuake!!!!!
 
 
PMD or MET:
You can see more about it at: http://www.eentec.com= /PMD/pmdproductpage.htm
 and MET Theory at: http://www.eentec.= com/PMD/ELECTROCHEMICA-1.doc
 
US Educational Seismic Network (USESN):
BTW, I attended the IRIS annual meeting in June and volunteered to = serve on=20 the US Educational Seismic Network (USESN) Committee.  It consists of = 9=20 states, which have their own high school seismic networks, PEPP related, and=20 the PSN.  I believe Gary Simila, seismologist from Cal State=20 Northridge, suggested  PSN be part of the USESN.  Since I was = familiar=20 with the PSN, I seconded the motion and described many of the PSN=20 activities.  The main focus of the USESN is to effectively promote = programs=20 for educational seismographs in schools.  No buddy does = it=20 better than you guys!
 
Nevada Educational Seismic Network (NESN):
I am working on putting together a 20 site network for Nevada high = schools=20 which I hope to have up and running by the beginning of 2002.  Funding= =20 comes from the Nevada Earthquake Safety Council and the Nevada Public = Agency=20 Insurance Pool. The planning has been going on for over a year, and much = of the=20 design and components has come from the PSN and Larry Cochrane.  = These=20 sites will be much cheaper per site (~$500) than the PEPP (~$2500)=20 sites.....Jim 
 
Jim O'Donnell
UNLV Adjunct Research Associate
Geoscience Dept. & Engineering Geophysics Lab.
Subject: RE: WinOncore From: "Tom Frey" tfreyis@........ Date: Thu, 30 Aug 2001 08:34:25 -0700 THanks to all that have replied to my plea for help. I have tried all suggestions. I also went away and left Oncore running for several hours (accidently) and when I returned it had locked to 3 satellites and had many others in-view. It now works on start-up (Just as it did in Stephens case)...so again thanks to all who kept me going! tom __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: PMD or MET seismometer & PEPP, USESN, PSN, NESN From: "Tom Schmitt" tschmitt@.............. Date: Fri, 31 Aug 2001 13:33:57 -0400 I looked at the block diagram for the MET sensor. I am a little = confused (my block diagrams often need telepathy to understand also). =20 There are two cathodes they re between the Anodes. In the block diagram = they are connected to an inverted triangle which has two outputs to a = "feedback amplifier". The only way I could figure to make it work was = to connect the catodes to ground through a shunt resister and convert = current to voltage by measuring teh voltage drop across the shunt? Then = take those volatages and sum them on an op amp to get the erro voltage. = =20 Am I off base. The sensor looks like fun. I wonder if they are usable on tiltmeters as = two 500 gallon taks seperated by a few hunder yards with a MET half way = could sense tilt. There is an issue of rate of course. Speaking of tilt has anyone heard from Sean-Thomas ? Tom Schmitt tschmitt@.............. ----- Original Message -----=20 From: Jim ODonnell=20 To: psn-l@................. Sent: Thursday, August 30, 2001 12:53 AM Subject: PMD or MET seismometer & PEPP, USESN, PSN, NESN Hi All- A little more info on the PMD/MET seismometer. I first heard = of it 2-3 years ago, as it was one of the PEPP (Princeton Earth Physics = Program) http://lasker.princeton.edu/education.html seismometers along = with the Guralp. I believe ~9 of the ~90 PEPP seismometers are the PMD = type. I always called it the chemical seis for lack of a better name. = The early PMD2's that PEPP has had, have not performed well. However, = Tom Owens's South Carolina group, SCEPP, has had a good experience with = the newer three component PMD machines. They have purchased around 40 = 3-component PMDs. At this time you cannot run SCREAM (Guralp's = software) with these machines, though. I am not sure about WinQuake- As = good as Scream is, many PEPP people prefer WinQuake!!!!! PMD or MET: You can see more about it at: = http://www.eentec.com/PMD/pmdproductpage.htm and MET Theory at: http://www.eentec.com/PMD/ELECTROCHEMICA-1.doc US Educational Seismic Network (USESN): BTW, I attended the IRIS annual meeting in June and volunteered to = serve on the US Educational Seismic Network (USESN) Committee. It = consists of 9 states, which have their own high school seismic networks, = PEPP related, and the PSN. I believe Gary Simila, seismologist from Cal = State Northridge, suggested PSN be part of the USESN. Since I was = familiar with the PSN, I seconded the motion and described many of the = PSN activities. The main focus of the USESN is to effectively promote = programs for educational seismographs in schools. No buddy does it = better than you guys! Nevada Educational Seismic Network (NESN): I am working on putting together a 20 site network for Nevada high = schools which I hope to have up and running by the beginning of 2002. = Funding comes from the Nevada Earthquake Safety Council and the Nevada = Public Agency Insurance Pool. The planning has been going on for over a = year, and much of the design and components has come from the PSN and = Larry Cochrane. These sites will be much cheaper per site (~$500) than = the PEPP (~$2500) sites.....Jim =20 Jim O'Donnell UNLV Adjunct Research Associate Geoscience Dept. & Engineering Geophysics Lab.
I looked at the block diagram for the = MET=20 sensor.   I am a little confused (my block diagrams often need = telepathy to understand also). 
 
There are two cathodes they re between = the=20 Anodes.  In the block diagram they are connected to an inverted = triangle=20 which has two outputs to a "feedback amplifier".  The only way I = could=20 figure to make it work was to connect the catodes to ground through a = shunt=20 resister and convert current to voltage by measuring teh voltage drop = across the=20 shunt?  Then take those volatages and sum them on an op amp to get = the erro=20 voltage.  
 
Am I off base.
 
The sensor looks like fun.  I = wonder if they=20 are usable on tiltmeters as two 500 gallon taks seperated by a few = hunder yards=20 with a MET half way could sense tilt.  There is an issue of rate of = course.
 
Speaking of tilt has anyone heard from = Sean-Thomas=20 ?
 
Tom Schmitt
 
tschmitt@..............
----- Original Message -----
From:=20 Jim = ODonnell
Sent: Thursday, August 30, 2001 = 12:53=20 AM
Subject: PMD or MET seismometer = &=20 PEPP, USESN, PSN, NESN

Hi All- A little more info on the PMD/MET seismometer.  I = first=20 heard of it 2-3 years ago, as it was one of the PEPP (Princeton Earth = Physics=20 Program) http://lasker.princet= on.edu/education.html=20 seismometers along with the Guralp.  I believe ~9 of the = ~90 PEPP=20 seismometers are the PMD type.  I always called it the chemical = seis for=20 lack of a better name.  The early PMD2's that PEPP has had, have = not=20 performed well.  However, Tom Owens's South Carolina group, = SCEPP, has=20 had a good experience with the newer three component PMD = machines.  They=20 have purchased around 40 3-component PMDs.  At this time you = cannot run=20 SCREAM (Guralp's software) with these machines, though. I am not sure = about=20 WinQuake- As good as Scream is, many PEPP people prefer = WinQuake!!!!!
 
 
PMD or MET:
You can see more about it at: http://www.eentec.c= om/PMD/pmdproductpage.htm
 and MET Theory at: http://www.eentec= ..com/PMD/ELECTROCHEMICA-1.doc
 
US Educational Seismic Network (USESN):
BTW, I attended the IRIS annual meeting in June and volunteered = to serve=20 on the US Educational Seismic Network (USESN) Committee.  It = consists of=20 9 states, which have their own high school seismic networks, PEPP = related,=20 and the PSN.  I believe Gary Simila, seismologist from Cal = State=20 Northridge, suggested  PSN be part of the USESN.  Since I = was=20 familiar with the PSN, I seconded the motion and described many of the = PSN=20 activities.  The main focus of the USESN is to effectively = promote=20 programs for educational seismographs in schools.  = No buddy=20 does it better than you guys!
 
Nevada Educational Seismic Network (NESN):
I am working on putting together a 20 site network for Nevada = high=20 schools which I hope to have up and running by the beginning of = 2002. =20 Funding comes from the Nevada Earthquake Safety Council and the Nevada = Public=20 Agency Insurance Pool. The planning has been going on for over a year, = and=20 much of the design and components has come from the PSN and Larry = Cochrane.  These sites will be much cheaper per site (~$500) than = the=20 PEPP (~$2500) sites.....Jim 
 
Jim O'Donnell
UNLV Adjunct Research Associate
Geoscience Dept. & Engineering Geophysics=20 Lab.
Subject: Fw: Relationship between PMD and MET From: "Larry Cochrane" cochrane@.............. Date: Fri, 31 Aug 2001 13:36:58 -0700 From John Lahr.... -Larry ----- Original Message ----- From: "The Lahrs" To: Sent: Friday, August 31, 2001 5:40 AM Subject: Relationship between PMD and MET > Hi Larry, > > Could you please forward this to the group? > > Thanks, > John > > >From: "The Center for Molecular Electronics" > >To: "The Lahrs" > >Subject: Re: MET Seismometer > >Date: Fri, 31 Aug 2001 10:17:44 +0400 > > > > Dear Dr. Lahr, > > > >Thank you very much for your translation. Now it sounds really great. > >Will you ever need translate anything to Russian, we promise to help you. > > > >Now about your question. PMD uses our MET transducers and some > >mechanical parts to build their instruments. Our seismometers have > >the same transducer but differ from PMD's sensors significantly in the > >mechanical design and electronic circuitry. As far as I know PEPP > >had some difficulties but now PMD fixed problems. The main problem > >for PEPP is that PMD sensors are rather expensive. > > > > Thank you again. > > Regards, Vladimir. > > > > > > * John C. and Jan H. Lahr > * JohnJan@........ > * 1925 Foothills Road > * Golden, Colorado 80401-1718 > * Phone: (303) 215-9913 > * http://lahr.org/john-jan > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re:gps From: barry lotz gbl@....... Date: Sat, 01 Sep 2001 17:51:16 -0700 Hi all Well I finally hooked up my Oncore GT+ board w/ interface. I'm trying the Tac32 program first. I had one question about the hardware. Do I need to hook up the backup battery as Larry shows on his website or does that wafer battery onboard work(with the foam underneath)? I still need to find where to put the antenna . For someone in the central Calif area what part of the sky is applicable? Regards Barry __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re:gps From: Jim Hannon jmhannon@........ Date: Sat, 01 Sep 2001 20:45:04 -0500 Barry, The GPS satellites are not in geosynchronous orbit so they move all over the sky anywhere in the world. You should position you antenna so that it "sees" as much of the sky directly overhead as possible. At 05:51 PM 9/1/01 -0700, you wrote: >Hi all > Well I finally hooked up my Oncore GT+ board w/ interface. I'm > trying the >Tac32 program first. I had one question about the hardware. Do I need to >hook up >the backup battery as Larry shows on his website or does that wafer battery >onboard work(with the foam underneath)? I still need to find where to put the >antenna . For someone in the central Calif area what part of the sky is >applicable? >Regards >Barry > > >__________________________________________________________ Jim Hannon http://soli.inav.net/~jmhannon/ 42,11.90N,91,39.26W WB0TXL __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Re:gps From: "Larry Cochrane" cochrane@.............. Date: Sat, 1 Sep 2001 18:47:05 -0700 Barry, You do not need to connect up a battery with these units. The battery on the GPS receiver should work fine. The antenna should be pointed straight up. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "barry lotz" To: Sent: Saturday, September 01, 2001 5:51 PM Subject: Re:gps > Hi all > Well I finally hooked up my Oncore GT+ board w/ interface. I'm trying the > Tac32 program first. I had one question about the hardware. Do I need to hook up > the backup battery as Larry shows on his website or does that wafer battery > onboard work(with the foam underneath)? I still need to find where to put the > antenna . For someone in the central Calif area what part of the sky is > applicable? > Regards > Barry __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: gps From: barry lotz gbl@....... Date: Sat, 01 Sep 2001 22:16:38 -0700 Thanks guys I set the antenna in the top inside of a skylight and it works fine. I got WinOncore to work but it seems inconsistant. Sometime it works and other times it needs a push. All in all I like it. Regards Barry __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Interesting Canadian Web Site From: Jaguar phyrekraker@........ Date: Sun, 02 Sep 2001 00:26:07 +0000 Just stumbled across this interesting site from Canada: http://www.pgc.emr.ca/seismo/table.htm Dan __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Interesting Canadian URL From: Jaguar phyrekraker@........ Date: Sun, 02 Sep 2001 00:35:15 +0000 Just stumbled across this interesting site from Canada: http://www.pgc.emr.ca/seismo/table.htm Dan __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: gps From: BOB BARNS roybar@........ Date: Sun, 02 Sep 2001 10:34:32 -0400 Barry, Jim's reply is a little misleading. A GPS receiver can get an accurate fix only if it can see some satellites near the horizon. Put your antenna where it can see as much of the whole sky as possible, not "directly overhead". Bob Barns Jim Hannon wrote: > > Barry, > The GPS satellites are not in geosynchronous orbit so they move all over > the sky anywhere in the world. You should position you antenna so that it > "sees" as much of the sky directly overhead as possible. > > At 05:51 PM 9/1/01 -0700, you wrote: > >Hi all > > Well I finally hooked up my Oncore GT+ board w/ interface. I'm > > trying the > >Tac32 program first. I had one question about the hardware. Do I need to > >hook up > >the backup battery as Larry shows on his website or does that wafer battery > >onboard work(with the foam underneath)? I still need to find where to put the > >antenna . For someone in the central Calif area what part of the sky is > >applicable? > >Regards > >Barry > > > > > >__________________________________________________________ > > Jim Hannon > http://soli.inav.net/~jmhannon/ > 42,11.90N,91,39.26W > WB0TXL > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: gps From: Jim Hannon jmhannon@........ Date: Sun, 02 Sep 2001 14:53:40 -0500 Bob, It is true you would like to see satellites from as wide a distribution in the sky as possible for an accurate fix. I was assuming that Barry was going to use his set up for timing the seismic data sampling. In which case you don't really need as good a pattern as you would need for a fix and directly over head is the most likely to be avaliable. At 10:34 AM 9/2/01 -0400, you wrote: >Barry, > Jim's reply is a little misleading. A GPS receiver can get an >accurate fix only if it can see some satellites near the horizon. Put >your antenna where it can see as much of the whole sky as possible, not >"directly overhead". >Bob Barns > > >Jim Hannon wrote: > > > > Barry, > > The GPS satellites are not in geosynchronous orbit so they move all over > > the sky anywhere in the world. You should position you antenna so that it > > "sees" as much of the sky directly overhead as possible. > > > > At 05:51 PM 9/1/01 -0700, you wrote: > > >Hi all > > > Well I finally hooked up my Oncore GT+ board w/ interface. I'm > > > trying the > > >Tac32 program first. I had one question about the hardware. Do I need to > > >hook up > > >the backup battery as Larry shows on his website or does that wafer > battery > > >onboard work(with the foam underneath)? I still need to find where to > put the > > >antenna . For someone in the central Calif area what part of the sky is > > >applicable? > > >Regards > > >Barry > > > > > > > > >__________________________________________________________ > > > > Jim Hannon > > http://soli.inav.net/~jmhannon/ > > 42,11.90N,91,39.26W > > WB0TXL > > > > __________________________________________________________ > > > > Public Seismic Network Mailing List (PSN-L) > > > > To leave this list email PSN-L-REQUEST@.............. with > > the body of the message (first line only): unsubscribe > > See http://www.seismicnet.com/maillist.html for more information. >__________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email PSN-L-REQUEST@.............. with >the body of the message (first line only): unsubscribe >See http://www.seismicnet.com/maillist.html for more information. Jim Hannon http://soli.inav.net/~jmhannon/ 42,11.90N,91,39.26W WB0TXL __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: gps From: "Larry Cochrane" cochrane@.............. Date: Sun, 2 Sep 2001 13:14:03 -0700 When I was doing my site survey of each of my sensors I had some problem at first with WinONCORE. I found that if you set each of the Output Rate fields in the NMEA Settings dialog box (under the Options menu) from the default of 1 to 2 seconds thins worked better. This slows things down a little but WinONCORE seems to be more stable with this change. I never got WinONCORE to work with the binary output format so I used the ASCII NMEA format. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "barry lotz" To: Sent: Saturday, September 01, 2001 10:16 PM Subject: Re: gps > Thanks guys > I set the antenna in the top inside of a skylight and it works fine. I got > WinOncore to work but it seems inconsistant. Sometime it works and other times > it needs a push. All in all I like it. > Regards > Barry > > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: A Great Feature of WinQuake From: peaches@............ (Donna Whitaker) Date: Tue, 4 Sep 2001 10:03:29 -1000 (HST) Hi all. For those of you that are not on the New-File mailing list, here is a copy of what I included with my ML4.0 file upload earlier this morning: >The USGS's location for this 4.0 event is suspect as I show a 14km difference between Ian's gram (hl0), my grams, and the USGS reported epicenter location. To check for yourself, down- load both our files into your WinQuake data folder, then open both our grams in WinQuake and hit the "locate event" button. You will see that our distance circles intersect aprox 14km from the reported epicenter. With Ian on the opposite side of the island, we are able to "bi-angulate" using this little used feature of Winquake. This, of course, hinges on both of our P and S picks. For those of you that didnt know that WinQuake could do this, Im glad I could help. WinQuake is fantastic. Thanks Larry.< I also need to thank Dave Nelson in Sydney, Australia who first showed me how to use this feature. Thanks mate. Tony Kona PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: self introduction From: Ron Thompson rlthompson@................. Date: Thu, 06 Sep 2001 18:14:27 -0230 Greetings, I'm Ron, I live in Gander, Newfoundland, Canada. As part of my self introduction here is a little personal information: Occupation: Instructor of avionics maintenance (aircraft electronic and instrument systems) at the local community college. Age: 46 Other interests: Photography, Astronomy, Amateur Radio (currently inactive) Reasons for joining the list: 1. I do not feel that I have a strong interest in earthquake detection, but I do have enough interest to try and build my own detection equipment and try and learn a little about earthquake detection from others on the list. 2. I would appreciate some help with detector design. I suspect that my location may not be suitable for some designs. Power lines, that carry enough current to hum, and from time to time the humming 'pulses' louder, are on two sides of the city lot my house is on. I'm concerned that an inductive pick-up would be affected by the power line magnetic field. 3. I have an idea for a detector design that I'd like (constructive) opinions on. Ron Thompson __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Fwd: can you help me? From: "Wayne Abraham" gold1146@........... Date: Thu, 06 Sep 2001 22:55:13 Hello All I received this email and thought I would pass it on to the list for more accurate responses than I can give. Please reply directly to Ricky. Thanks, Wayne >From: ricky balshaw >To: gold1146@........... >Subject: can you help me? >Date: Thu, 6 Sep 2001 02:56:10 -0700 (PDT) > >Hello! i am a student at a school in England and am >wondering if you can help me? > >I have got to do a project on Earthquakes and i am >wondering if you could send me some information about >them? all i need to know is how they start and, what >type of waves are made and how they are measured. > >If you cant help me thank you for taking time to read this. > >__________________________________________________ >Do You Yahoo!? >Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger >http://im.yahoo.com _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Fw: Induced quakes From: "Larry Cochrane" cochrane@.............. Date: Thu, 6 Sep 2001 21:43:14 -0700 ----- Original Message ----- From: Charles Watson Newsgroups: bit.listserv.quake-l To: QUAKE-L@.................. Sent: Thursday, September 06, 2001 9:32 PM Subject: Induced quakes One million children plan jump to create "quake" LONDON, Sept 7 (Reuters) - One million British school children will jump up and down simultaneously on Friday in a bid to create an earthquake and enter the record books as the world's largest scientific experiment. Thousands of schools around Britain have been asked to send children out into the playgrounds at 11 a.m (1000 GMT) to jump up and down for a minute in the hope of creating a measurable quake. "Will it make an impact on Britain's seismic network? Nobody knows -- that's why we are doing the experiment," the organisers of The Giant Jump event, held to mark the launch of the government's Science Year, said on its website. Scientists say a million children with an average weight of 50kg (7st 12 lb) jumping 20 times in a minute would release two billion joules of energy and trigger the equivalent of an earthquake measuring three on the Richter scale. "Britain is hit by magnitude three earthquakes all the time but you do not ever notice it," Dr Ted Nield of the Geological Society of London told the BBC. "The only danger is that somebody injures themselves jumping." But children surveyed have come up with some definite, if unlikely, views on what the consequences of the giant jump will be. While one fearful child thought the world would split in two, another thought it would simply shake and then go out of its orbit. A third came up with a more pragmatic, if less exciting, scenario. "There will be lots of hospital visits from people with sprained ankles." 23:55 09-06-01 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: self introduction From: CapAAVSO@....... Date: Fri, 7 Sep 2001 08:20:01 EDT In a message dated 9/6/01 9:47:20 PM GMT Daylight Time, rlthompson@................. writes: << 3. I have an idea for a detector design that I'd like (constructive) opinions on. >> Hello Ron, Please tell us more about your idea for a detector. Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Fwd: can you help me? From: The Lahrs johnjan@........ Date: Fri, 07 Sep 2001 06:47:25 -0600 Hi Ricky, A good starting point for information on earthquakes is this page from IRIS: http://www.iris.washington.edu/EandO/ Best of luck with your studies. John At 04:55 PM 9/6/2001 , you wrote: >Hello All > >I received this email and thought I would pass it on to the list for more >accurate responses than I can give. Please reply directly to Ricky. > >Thanks, >Wayne > > >>From: ricky balshaw >>To: gold1146@........... >>Subject: can you help me? >>Date: Thu, 6 Sep 2001 02:56:10 -0700 (PDT) >> >>Hello! i am a student at a school in England and am >>wondering if you can help me? >> >>I have got to do a project on Earthquakes and i am >>wondering if you could send me some information about >>them? all i need to know is how they start and, what >>type of waves are made and how they are measured. >> >>If you cant help me thank you for taking time to read this. >> >>__________________________________________________ >>Do You Yahoo!? >>Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger >>http://im.yahoo.com > > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp > >__________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email PSN-L-REQUEST@.............. with the body of the >message (first line only): unsubscribe >See http://www.seismicnet.com/maillist.html for more information. * John C. and Jan H. Lahr * JohnJan@........ * 1925 Foothills Road * Golden, Colorado 80401-1718 * Phone: (303) 215-9913 * http://lahr.org/john-jan __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Principles of Seismology From: Doug Crice dcrice@............ Date: Fri, 07 Sep 2001 06:29:29 -0700 A new book, Principles of Seismology by Agustin Udias. ISBN 0-521-62478-9. Cambridge, 1999. 475 p. received favorable reviews in the August issue of "The Leading Edge", published by the Society of Exploration Geophysicists. This book, dealing with earthquake seismology, is reportedly priced at $39.95; quite reasonable for a scientific textbook. You can read the reviews by going to http://www.seg.org then searching for "principles of seismology" or going to the issue of TLE. Find it on Amazon at http://www.amazon.com/exec/obidos/ASIN/0521624789/qid=999869462/sr=1-1/ref=sc_b_1/002-0119005-0036045 -- Doug Crice http://www.georadar.com 19623 Via Escuela Drive phone 408-867-3792 Saratoga, California 95070 USA fax 408-867-4900 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: detector design question From: Ron Thompson rlthompson@................. Date: Fri, 07 Sep 2001 12:42:21 -0230 Thanks for the reply, I'm just home for lunch and will put together a reply. I scanned in a rough sketch to go with the explanation, the file size is under 40K but I believe attachments are not allowed on the list, so I'll e-mail you, and whoever else would like to offer comments, directly. Ron CapAAVSO@....... wrote: > In a message dated 9/6/01 9:47:20 PM GMT Daylight Time, > rlthompson@................. writes: > > << 3. I have an idea for a detector design that I'd like (constructive) > opinions on. >> > > Hello Ron, > > Please tell us more about your idea for a detector. > > Cap > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: Ron Thompson rlthompson@................. Date: Sat, 08 Sep 2001 12:50:43 -0230 Thanks for the comments, I just got back from breakfast out and haven't given enough thought to the reply that I received from Charles. Regarding the component count, I believe that the component count will not be a problem. Low noise op-amps should not be required until after the phase/frequency comparator to drive the analogue output. I did look at the file for a design that used a capacitively coupled radiating plate that detected motion by the comparing the field strength on two receiving antennae on either side of the radiating plate. This design had some appeal, but I wanted to twist it around (just can't resist the desire to fix something thats not broken - or to quote a Canadian comedian -' if it ain't broke you're not trying'). My twist on this is to have the radiating plates on the outside, the two plates 180 degrees out of phase with each other, and have the receiving antenna on the arm in the null field position so that at rest no signal is received. A vibration of the receiving antenna would move it out of the null position and the amplitude of the vibration would directly affect the amplitude of the signal received, and by phase comparing it with a reference from the oscillator the direction that the receiving antenna moved could also be determined. Take it one step further and use synchronous detection and electrical noise received by the moving recieving antenna would be further reduced. I liked the concept of the Opto 2000 design, but I felt that the electronics component count could be reduced. And I wanted to see if a signal to noise ratio improvement could be realized by using phase modulation / detection over analogue detection of the Opto 2000 photo detection method. My personal goal, I guess, is to have a reasonably sensitive detector with an acceptible noise immunity, with some longer term stability (thermal and mechanical), a current drain low enought so that it could operate off a small solar panel and battery, and be reasonably compact (like the Opto 2000). Ron CapAAVSO@....... wrote: > Hello Ron and Charles, > > A coil moving in a magnetic field such as used on the Lehman seismometers > most of us use is a simple motion detector but yet has adequate sensitivity > to detect earthquakes. I believe before you replace this simple device with a > more complicated one you should first try out the simple device to see just > how much it is affected by the power lines you mention in your first letter. > I have serious doubts that they will be as much of a problem as you > anticipate. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: Tom Leiper twleiper@........ Date: Sat, 8 Sep 2001 11:50:53 -0400 On Sat, 08 Sep 2001 12:50:43 -0230 Ron Thompson writes: > My twist on this is to have the radiating plates on the > outside, the two plates 180 degrees out of phase with > each other, and have the receiving antenna on the arm > in the null field position so that at rest no signal is received. The problem with that approach is the wavelength of the RF signal you are nulling is probably thousands (or millions) of times the excursion of your detector, so you would have to get well up into the SHF range to have short enough wavelengths to permit some kind of rational experimentation with tuned elements and phase detection. The other detectors to which you refer take advantage of the inverse square law and are largely frequency independent. You could do it with light just the same, except the RF doesn't need to be kept in the dark. But hey, keep twisting away at it...you'll get it broke yet :-) Tom __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: Ron Thompson rlthompson@................. Date: Sat, 08 Sep 2001 14:17:08 -0230 I better clarify this, and BTW my job depends on people breaking things, someone must keep up the good work :-) The device is not looking for a phase angle, but simply once the receiving antenna is moved out of dead centre between the two radiating plates (where the two fields from the two radiators should produce a null point) it will capacitively couple to the closest plate and have a voltage on it that is in phase with the closest plate. The amplitude of the signal on the receiver is inversely proportional to the distance to the nearest plate, and the phase of this signal is either 0 degrees or 180 degrees with respect to the reference. Vibration magnitude then is determined by the induced voltage on the received antenna, and the phase relationship tells us if the receiver plate moved to one side or the other, but not how far. I believe that this should work at a frequency where the length of the coax to the receiving plate should not introduce a significant phase shift itself, and within the range of cheaper digital IC's. Tom Leiper wrote: > The problem with that approach is the wavelength of the > RF signal you are nulling is probably thousands (or millions) > of times the excursion of your detector, so you would have to > get well up into the SHF range to have short enough wavelengths > to permit some kind of rational experimentation with tuned > elements and phase detection. The other detectors to which > you refer take advantage of the inverse square law and are largely > frequency independent. You could do it with light just the same, > except the RF doesn't need to be kept in the dark. I was also concerned about the current draw of the lamp in the Opto 2000 design (with respect to solar panel / battery powering the detector), and that the bulb is the component with the lowest mean time before failure. RF oscillators can be built to draw under 5 ma. Ron > > > But hey, keep twisting away at it...you'll get it broke yet :-) > Given half a chance I could get it to work - the wrong way :-) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: "Charles R. Patton" charles.r.patton@........ Date: Sat, 08 Sep 2001 11:11:25 -0700 Ron Thompson wrote: > ... > receiving antenna is moved out of dead centre between the two radiating > plates (where the two fields from the two radiators should produce a > null point) it will capacitively couple to the closest plate and have a > voltage on it that is in phase with the closest plate... This approach sounds fine. One variation that might be interesting is to mount the radiating panel on the boom, but make that panel out of double sided PC board. Drive it with a center-tapped RF transformer. That way your 180 degree phase is on opposite sides of that panel and you can resonate the capacitance of the panel easily, which makes driving it easy. Now the pick-up plates will be stationary and close to the detector circuit and easily shielded with short lead lengths and you can null their output with simple summing which is then fed to a synchronous detector (an RF mixer) in order to recover the direction of displacement. Since the voltage on the radiating plate can be in the volts range and mixers can have microvolt noise levels, the potential exists for 120 dB dynamic range - now you've met many of your requirements. Everything mentioned above can be fairly hi-Q - read low loss - so power consumption can be restrained and the additional side benefit is hi-Q also results in good S/N levels which is necessary for low noise floors. I have to make additional comments on the area of VCOs. First, in response to my comment about noise in the power to your VCOs you mentioned using a 78L08 regulator. Unit IC regulators have many microvolt noise figures. It can be a substantial problem in low-noise instrument designs that require low noise power such as for references. The problem stems from the use of buried zeners or the even noisier band-gap references internally. The standard solution is to use lots of RC filtering but this becomes difficult at really low frequency - frequencies such as in seismic records. One solution was to go to mercury batteries as a reference - very low noise figures. Second, for low-noise in a VCO, it is typically locked to a low-noise crystal oscillator, which effectively gives it hi-Q. Your application by definition has to be un-locked. This is a recipe for noise -- lots of it. Hi-Q LC oscillators are possible, but the detector scheme would have to change. An example I can think of is to use a high frequency in the variable LC oscillator (not a VCO). Implement the oscillator with the boom causing variable capacitance, which can be done without requiring any wires, so only a plate or tube is on the end of the boom. Take the oscillator output and use a D-flop mixer using a crystal as a reference to bring the frequency down to the audio range. Now you can go a couple of ways. A CMOS VCO such as a 4046 locked to the audio note with the control voltage used as the output measure of displacement. Or feed the the audio frequency into a freq-to-voltage IC. (National used to have one and I believe there are others.) This can be a low current scheme and low noise that has no sensitivity to power line frequencies. Regards, Charles R. Patton __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: Ron Thompson rlthompson@................. Date: Sat, 08 Sep 2001 16:33:30 -0230 Thanks, This helps "Charles R. Patton" wrote: > > > This approach sounds fine. One variation that might be interesting is > to mount the radiating panel on the boom, but make that panel out of > double sided PC board. Drive it with a center-tapped RF transformer. > That way your 180 degree phase is on opposite sides of that panel and > you can resonate the capacitance of the panel easily, which makes > driving it easy. Now the pick-up plates will be stationary and close to > the detector circuit and easily shielded with short lead lengths and you > can null their output with simple summing which is then fed to a > synchronous detector (an RF mixer) in order to recover the direction of > displacement. A quick question at this point. I had thought about driving the two stationary plates using the centre tapped transformer and have the receiving plate move as there would only be a single detector instead of two that would need to stable and matched with respect to each other. But perhaps this isn't a problem if the two receiving plates feed the two opposite ends of another centre tapped transformer. This transformer would have two identical coils wound in opposite directions and the centre tap connected to the receiver/detector. With the radiator centred the two receiver plates would have identical voltage and opposite phase and the two oppositely wound coils on the detector would cancel each other. Through in a couple of variable resistors, or whatever to balance the detector circuit initially and it should stay balanced. Comments? Ron __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: STA/LTA triggering From: "Larry Cochrane" cochrane@.............. Date: Sat, 8 Sep 2001 13:45:55 -0700 All, On my SDR STA/LTA setup page (http://www.seismicnet.com/sdrdocs/stalta.htm) there has been a broken link while Eric Bergman updates the Manual of Seismological Observatory Practice (http://www.seismo.com/msop/nmsop/nmsop.html). This manual has an excellent write-up on how STA/LTA triggering works and how to adjust the STA/LTA parameters used in the current version of SDR, my datalogging software. Here's the link: http://www.seismo.com/msop/nmsop/08%20networks/IS8.1/IS8.1.html Regards, Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: New WinQuake beta release From: "Larry Cochrane" cochrane@.............. Date: Sat, 8 Sep 2001 16:43:34 -0700 All, Today I released a new WinQuake beta release. The version number is 2.8 beta 1 with a release date of 09/06/2001. You can download the new release here: http://www.seismicnet.com/software.html There are two versions of the new release. I have a full release (wq281b_full.exe) that contains a setup program that loads all of the files needed to run the new release. You do not needed to install WinQuake 2.6 first. The other file (wq281b.zip) only contains the new winqk32.exe file and a few updated *.dat files. Make sure you copy all of the files in the zip file to your WQ root directory. Here's what's new in this release: Long File Names: I added support for long event file names. In the Save File dialog box there is a check box called Long File Name. If checked, WQ will rename a 8.3 name to a longer name. I choose the following format: YYMMDD.HHMN.id.psn Where YY = two character year, MM = month, DD = day, HH = hour and MN = Minutes. ID = is the station ID and the file name always ends in .psn so that the PSN format (old or new) can be associated with a view like WQ. If you keep the Long File Name selected after closing the Save File dialog box, WQ will also rename a 8.3 file to the long format if you add a report from the main Open File Dialog box. Multiple Event Reports: The other day we had two local events within a few minutes of each other. Since the new PSN Type 4 format can handle more then one event report in the variable header section of the event file I added code to support this feature. You maintain the list of events in the Event Information dialog box. There you can add, replace or clear a report. You also use this dialog box to select the event that WQ will use as the current report. Since WQ only has one set of P and S markers you need to select the event that you are interest in locating using the Locate P and S feature. If you add a new report to an event file in the main open File dialog box, and if you already have an event report in the file, you will be asked if you want to add or replace the current report. New Event Report Service: I added support for a new Internet Event Report service at ftp://ghtftp.cr.usgs.gov/pub/cnss/cnss.fing. This is a composite list with both small and large events for around the world. GSE 2.0 Format: This format is used by the AutoDRM systems on the Internet. Arie in Australia has a good write-up on how to use the AutoDRM mail system to receive event files over the Internet. See http://members.iinet.net.au/~ajbv/AutoDRM/AutoDRM.html for more information. Before WQ would only look at the first line of the event file looking for the keyword "BEGIN GSE2.0". WQ now will read up to 80 lines looking for this keyword and also the "CONTINUATION" keyword. If you receive a AutoDRM file all you should need to do is save the file as a text file and point WQ to the directory containing the new file. WQ should be able to find and display the file name in the Open File dialog box. SAC Binary bug fix: I fixed a bug in how WQ would save SAC binary files. The file created by the last beta release could not be read by the SAC program. That's it. Please report any problems encountered with the new release or the new setup program ASAP so I can finalize the release. Next up is updating the documentation..... Regards, Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: Tom Leiper twleiper@........ Date: Sun, 9 Sep 2001 05:05:24 -0400 On Sat, 08 Sep 2001 14:17:08 -0230 Ron Thompson writes: > I better clarify this, and BTW my job depends on people breaking > things, someone must keep up the good work :-) > [edited] > Vibration magnitude then is determined by the induced voltage > on the received antenna, and the phase relationship tells us if > the receiver plate moved to one side or the other, but not how far. > I believe that this should work at a frequency where the length > of the coax to the receiving plate should not introduce a > significant phase shift itself, and within the range of cheaper > digital IC's. But, while that might be a clever way to determine direction, I still think that if you do the math, you'll see that to get a measurable phase shift even for a rather significant movement of, say, 1mm, you would need a wavelength of 4 to 10 mm...moving you into the rarified area of the spectrum above 30 Ghz which, even if you could produce and detect it, would make coax just a dream since you would be working with waveguides and cavity tuned elements, and definitely not with cheap IC's. This argument completely ignores the additional problem of the interaction of your detector element with your radiator elements since, in order to receive a signal of any magnitude, it would have to be tuned to some extent, and who knows what phase angles would be present in such a closely coupled environment. If you really want a super-sensitive and novel way of detection, why don't you review the archives for a post I did last year which described a method whereby two oscillators are permeably (and oppositely) tuned by a moving core, and very sensitive frequency changes are, in effect, measured with cheap presettable counters. If fact, I think I even biased the coils with dc feedback to make it a force-balance instrument at the same time. I have not had the time to build it, but I know it will work. And so there is more grist for our ever grinding mill... Tom __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: Ron Thompson rlthompson@................. Date: Sun, 09 Sep 2001 10:36:22 -0230 An attempt to make a text sketch of the concept. ---- CENTRE TAPPED COIL---- | | | | GND | T T X M X | O | A V A N I N T N T G | R V R X A X | N | A E A N | N T | T | | ----------------------------------- | This is, I believe, in simple form the basic idea of the detector. It should work well in the MHz range, within the limits of 4000 series CMOS logic circuits. The exciter (Transmitter) puts an RF voltage on the two TX antennae through the centre tapped coil, so the two TX antennae are always 180 out of phase with each other. The moving vane capacitively couples to the TX antennae, and when the vane is dead centre between the antennae it is in a null field and has 0 volts RF on it, and no voltage is capacitively coupled to the RX antennae. Move the vane to one side or the other and it is out of the null position. The vane now has a voltage on it, and the phase of the voltage, with respect to the oscillator reference will be in phase or 180 degrees out of phase, depending upon which side the vane moved to. The vane capacitively couples to the two RX antennae. The RX antennae are connected together and go into a high gain, low noise amplifier and the 0 or 180 degree phase shift, with respect to the oscillator, gives left / right (or up / down) information while RX signal amplitude gives vibration amplitude information. Phase differentiation then is only 0 or 180. It should work, I believe, in the MHz range, where wire lengthes and propagational delays will not be critical. Tom Leiper wrote: > If you really want a super-sensitive and novel way of detection, > why don't you review the archives for a post I did last year which > described a method whereby two oscillators are permeably (and > oppositely) tuned by a moving core, and very sensitive frequency > changes are, in effect, measured with cheap presettable counters. > If fact, I think I even biased the coils with dc feedback to make it > a force-balance instrument at the same time. I have not had the > time to build it, but I know it will work. > > And so there is more grist for our ever grinding mill... > > Tom This sounds like what I had in mind initially. I'd be glad to take a look at it. Is there an easy way to identify your file? Thanks for the interest, Ron __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: ChrisAtUpw@....... Date: Sun, 9 Sep 2001 09:30:58 EDT In a message dated 09/09/01, rlthompson@................. writes: Hello there Rick, The system seems to have trashed your layout diagram symbols. If you could send it again, starting each display line with a colon please, we can probably sort it out, if it does it again Regards, Chris Chapman In a message dated 09/09/01, rlthompson@................. writes:

Hello there Rick,

      The system seems to have trashed your layout diagram symbols. If you could send it aga in, starting each display line with a colon please, we can probably sort it out, if it does it again

      Regards,

      Chris Chapman

Subject: Detector - text sketch From: Ron Thompson rlthompson@................. Date: Sun, 09 Sep 2001 13:18:42 -0230 An attempt to make a text sketch of the concept. ---- CENTRE TAPPED COIL---- | | | | GND | | | T M T X O X | V | A I A N N N T G T | | R V R X A X | N | A E A N | N T | T | | | | | ------------------------------------ | TO RCVR I hope it worked this time. Ron __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Lo'ihi swarm From: ian ian@........... Date: Mon, 10 Sep 2001 19:40:04 -1000 just to point out that Lo'ihi (the newest addition to the Hawaiian islands - still submerged) is swarming with quakes again. Another growing spurt! Causing plenty of work here extracting the events... I Smith __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: FROM ITALY From: "Francesco" franuc@...... Date: Tue, 11 Sep 2001 18:20:41 +0200 To all USA citizen of the PSN mailing list: =20 All the Italian Experimental Seismic Network wants to express our deep sorrow for the beyond description attack to your country. We are astonished of this cruelty and devastation we see on the TV. We hope anyone relatives and or friends of you of the mailing list were in danger of this attack. =20 Sharing with you the deep sorrow, we great all of you in this sad day. Francesco IESN-PSN ITALY =20
To all USA citizen of the PSN = mailing=20 list:
 
All the Italian Experimental Seismic = Network wants=20 to express
our deep sorrow for the beyond = description attack=20 to your country.
We are astonished of this cruelty and = devastation=20 we see on the TV.
We hope anyone relatives and or friends = of you of=20 the mailing list were
in danger of this attack.
 
Sharing with you the deep sorrow, = we great all=20 of you in this sad day.
 
 
Francesco    IESN-PSN ITALY
 
Subject: Re: FROM ITALY From: CapAAVSO@....... Date: Tue, 11 Sep 2001 16:53:02 EDT In a message dated 9/11/01 5:25:01 PM GMT Daylight Time, franuc@...... writes: << All the Italian Experimental Seismic Network wants to express our deep sorrow for the beyond description attack to your country. We are astonished of this cruelty and devastation we see on the TV. We hope anyone relatives and or friends of you of the mailing list were in danger of this attack. >> Dear Francesco, Thank you for your thoughtful letter and expressions of sympathy for what has happened to innocent people in our country. It is good to hear from friends in another nation at times like this. For what it's worth I will tell you my thoughts on this tragedy today while they are fresh in my mind. When I turned on the radio (I do not have a TV) and heard what happened to the World Trade Center I immediately thought back ~ 60 years ago when I turned on the radio then and heard that the Japanese had bombed Pearl Harbor. 7 December 1941 was a day of infamy that changed the world. And 11 September is also a day of infamy and like Pearl Harbor it will probably change the world too. In 1941 we knew it was Japan that destroyed Pearl Harbor and the next day the USA declared war, a war that eventually destroyed Japan. Today we do not know who destroyed the World Trade Center but I'm sure we will find out. When we do, no war will be declared this time, but I believe that nation is apt to suffer a fate similar to that of Japan. Thanks again for your kind letter expressing sorrow for what happened. I appreciate it very much. Best regards, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: World Trade Center Collapse From: "Bob Hancock" robert.hancock@........... Date: Tue, 11 Sep 2001 20:08:49 -0400 I believe that the collapse of both World Trade Center buildings were = recorded by the Palisades station, a part of the Lamont-Doherty network. = The recording station was 31 miles from the World Trade Center on a = heading of 012 degrees true. When you access the site, use the = following criteria: Station - PAL; Component - E-W; Frequency Band - = Short-Period =20 Date change is on the right hand side of the page Previous - = Next=20 The first collapse appears the have happened about 1358 UTC (0958 = EDT) and the second colapse occurred about 1428 UTC (1028 EDT). Here is the link: = http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl Bob Hancock
I believe that the collapse of both = World Trade=20 Center buildings were recorded by the Palisades station, a part of = the=20 Lamont-Doherty network.  The recording station was 31 miles from = the World=20 Trade Center on a heading of 012 degrees true.  When you access the = site,=20 use the following criteria:
 
    Station -=20 PAL;       Component - E-W;       = Frequency Band - = Short-Period   
 
    Date change is on = the right hand=20 side of the page      Previous - = Next 
 
    The first collapse = appears the=20 have happened about 1358 UTC (0958 EDT) and the second colapse occurred = about=20 1428 UTC (1028 EDT).
 
    Here is the = link:
 
       =20     h= ttp://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl<= /DIV>
 
 
Bob Hancock
 
Subject: World Tade Center Collapse From: "Bob Hancock" robert.hancock@........... Date: Tue, 11 Sep 2001 20:19:54 -0400 I believe that the collapse of both World Trade Center buildings were = recorded by the Palisades station, a part of the Lamont-Doherty network. = The recording station was 31 miles from the World Trade Center on a = heading of 012 degrees true. When you access the site, use the = following criteria: Station - PAL; Component - E-W; Frequency Band - = Short-Period =20 =20 Date change is on the right hand side of the page Previous - = Next=20 The first collapse appears the have happened about 1358 UTC (0958 = EDT) and the second collapse occurred about 1428 UTC (1028 EDT). Here is the link: = http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl Bob Hancock
I believe that the collapse of both = World Trade=20 Center buildings were recorded by the Palisades station, a part of = the=20 Lamont-Doherty network.  The recording station was 31 miles from = the World=20 Trade Center on a heading of 012 degrees true.  When you access the = site,=20 use the following criteria:
 
    Station -=20 PAL;       Component - E-W;       = Frequency Band - = Short-Period   
 
    Date change is on = the right hand=20 side of the page      Previous - = Next 
 
    The first collapse = appears the=20 have happened about 1358 UTC (0958 EDT) and the second collapse occurred = about=20 1428 UTC (1028 EDT).
 
    Here is the = link:
 
       =20     h= ttp://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl<= /DIV>
 
 
Bob Hancock
 
Subject: Re: IDENTIFICATION ASSISTANCE REQUESTED From: RADIOTEL@....... Date: Tue, 11 Sep 2001 22:53:39 EDT My long period lehman sensor detected what appears to be significant quake activity at approximately 15:40 - 15:45 UTC September 11, 2001 (Today). However, I can not find any listing of a quake at or near that time. Did anyone else detect this? I live in Southern California Jim Allen Cerritos, California My long period lehman sensor detected what appears to be significant quake
activity at approximately 15:40 - 15:45 UTC  September 11, 2001 (Today).  
However, I can not find any listing of a quake at or near that time.  Did
anyone else detect this?  
I live in Southern California
Jim Allen
Cerritos, California Subject: Re: IDENTIFICATION ASSISTANCE REQUESTED From: Canie canie@........... Date: Tue, 11 Sep 2001 20:42:31 -0700 Take a look at this quake list - something in China:
http://www.emsc-csem.org/cgi-bin/ALERT_all_ messages.sh?1

Canie

At 10:53 PM 9/11/01 -0400, you wrote:
My long period lehman sensor detected what appears to be significant quake
activity at approximately 15:40 - 15:45 UTC  September 11, 2001 (Today).  
However, I can not find any listing of a quake at or near that time.  Did
anyone else detect this?  
I live in Southern California
Jim Allen
Cerritos, California
Subject: Re: IDENTIFICATION ASSISTANCE REQUESTED From: johnc c cole johnccole1@........ Date: Wed, 12 Sep 2001 00:45:31 -0500 Jim, Indeed i did. I could find nothing listed . Until you sounded the alarm , i thought that i was in error on the time. You were within a few minutes of my time . That happens to me quiet often John ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: IDENTIFICATION ASSISTANCE REQUESTED From: Dave Nelson davenn@.............. Date: Wed, 12 Sep 2001 17:29:53 +1000 At 22:53 11/09/01 -0400, you wrote: >My long period lehman sensor detected what appears to be significant quake >activity at approximately 15:40 - 15:45 UTC September 11, 2001 (Today). >However, I can not find any listing of a quake at or near that time. Did >anyone else detect this? >I live in Southern California >Jim Allen >Cerritos, California jim here's ur event 01/09/11 14:56:50 0.56S 133.17E 33.0 6.4 IRIAN JAYA REGION, INDONESIA Dave Dave A. Nelson ZL4TBN 13 Monash Rd., Gladesville, (Sydney) 2111 NSW, Australia http://www.seismicnet.com/dave/home.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: detector design From: ChrisAtUpw@....... Date: Wed, 12 Sep 2001 07:52:27 EDT Dear Charles Patton, I have came across the use of the NE5521 LVDT Integrated Circuit in a SG type sensor kit from an Italian firm. I checked back through the archives and noticed that you had mentioned this beastie way back in 1997! Do you know if anyone has ever evaluated it for amateur seismic work, please? The spec sheet does not look too exciting, but no actual noise or drift figures, particularly for frequencies below 10 Hz, are quoted. Regards, Chris Chapman Dear Charles Patton,

      I have came across the use of the NE5521 LVDT Integrated Circuit in a
SG type sensor kit from an Italian firm. I checked back through the archives
and noticed that you had mentioned this beastie way back in 1997!
      
      Do you know if anyone has ever evaluated it for amateur seismic work,
please? The spec sheet does not look too exciting, but no actual noise or
drift figures, particularly for frequencies below 10 Hz, are quoted.

      Regards,

      Chris Chapman

      
Subject: Re: World Trade Center Collapse From: BOB BARNS roybar@........ Date: Wed, 12 Sep 2001 10:12:22 -0400 Hi Bob, Yes, that was reported in the NY Times this morning. I did not see it--my noise level is higher than Lamont's because their sensor is several feet underground. This reduces the effect of wind and ocean waves. Both were high here--the surf was 3-6' because of the hurricane. Good to hear from you again. Bob > Bob Hancock wrote: > > I believe that the collapse of both World Trade Center buildings were > recorded by the Palisades station, a part of the Lamont-Doherty > network. The recording station was 31 miles from the World Trade > Center on a heading of 012 degrees true. When you access the site, > use the following criteria: > > Station - PAL; Component - E-W; Frequency Band - > Short-Period > > Date change is on the right hand side of the page Previous - > Next > > The first collapse appears the have happened about 1358 UTC (0958 > EDT) and the second colapse occurred about 1428 UTC (1028 EDT). > > Here is the link: > > > http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl > > > Bob Hancock > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Subject: World Trade Center Collapse From: Jim ODonnell jimo17@........ Date: Wed, 12 Sep 2001 11:12:40 -0700 Hi All- Bob Hancock called this one just right....Jim Here is a summary of seismic observations of the two impacts and the two collapses: http://www.ldeo.columbia.edu/LCSN/Eq/20010911_wtc.html
Hi All-  Bob Hancock called this one just right....Jim

Here is a summary of = seismic=20 observations of the
two impacts and the two collapses:=20
http://www.= ldeo.columbia.edu/LCSN/Eq/20010911_wtc.html

Subject: winquake feature From: "Francesco" franuc@...... Date: Thu, 13 Sep 2001 00:48:04 +0200 Hi Larry. I saw in the new release an option called "winSDR mode" in replay = channel information box. I didn't found any explanation in the help-line. What is this? Regards Francesco
Hi Larry.
I saw in the new release an option = called "winSDR=20 mode" in replay channel information box.
I didn't found any explanation in the=20 help-line.
What is this?
 
Regards
Francesco
Subject: Questions from a novice From: dale.hughes@................ Date: Fri, 14 Sep 2001 11:38:00 +1100 Hi, My name is Dale Hughes and I have been receiving mail from this list for some time and have found it very interesting. I have almost completed a basic system which consists of the following: - A home made vertical geophone with a natural frequency of about 4Hz, - An amplifier system which can give me a voltage gain of up to 2e7 or 146 db, - 4 pole low pass filter with selectable cutoff frequencies of 20Hz, 10Hz, 5Hz, 2Hz & 1Hz, - Software written in LabVIEW 5 running on a 486PC to acquire data at up to 20HZ using a 12 bit ADC card. The geophone uses 2 rare earth magnets attached to a 375gm aluminium cylinder supported by a spring inside a 50mm tube. The pickup coil is 12000 turns of fine wire on the outside of the tube. Damping has yet to be optimised and is currently acheived by felt strips stuck to the side of the Al cylinder so that friction brings the mass to rest in a few seconds - otheriwse it oscillates for many minutes. I live in a rural location about 30KM South East of Canberra in south eastern Australia and plan to install the geophone several hundred meters from the house. This location will be about 1KM from the nearest road. I have made test recordings over the last few weeks while getting the system working and have recorded what, to my untrained eye, look like seismic events - particularly the recent event near Indonesia. Even with the geophone siting on the desk in the study the system appears to be very sensitive and is driven into saturation by footsteps within a few meters. So my questions are: - Is the above system likely to be sensitive enough for useful work? - I have run the system with the LPF at 5Hz and logging at 10Hz, is this a reasonable setting? - Any other suggestions? Many thanks Dale Hughes VK2DSH __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Questions from a novice From: ChrisAtUpw@....... Date: Thu, 13 Sep 2001 22:29:43 EDT In a message dated 14/09/01, dale.hughes@................ writes: > The geophone uses 2 rare earth magnets attached to a 375gm aluminium > cylinder supported by a spring inside a 50mm tube. The pickup coil is 12000 > turns of fine wire on the outside of the tube. Damping has yet to be > optimised and is currently acheived by felt strips stuck to the side of the > Al cylinder so that friction brings the mass to rest in a few seconds - > Hi there Dale, Can you damp the motion by attaching a rod(s) with a disk on the end down from the mass and dipping it into an oilbath? You do need the weight to be critically damped - if you push the mass down a tiny bit, it should return to the rest position, but it should not oscillate at all. Sorry, but I very much doubt if the stick and slip friction given by the felt will be satisfactory. Suggest you use a brass weight for your next version. It has a relative density of 8.5, so you can submerge the whole mass into mineral oil which has a relative density of ~0.9, with not much loss of weight. Al has a relative density of only 2.7, so submerging it would reduce the weight to ~1.8 / 2.7 times the weight in air. You do need to submerge the weight or the surface tension will probably pull it up against the cylinder wall. Good luck! Chris Chapman In a message dated 14/09/01, dale.hughes@................ writes:

The ge ophone uses 2 rare earth magnets attached to a 375gm aluminium
cylinder supported by a spring inside a 50mm tube. The pickup coil is 12000 turns of fine wire on the outside of the tube. Damping has yet to be optimised and is currently acheived by felt strips stuck to the side of the Al cylinder so that friction brings the mass to rest in a few seconds - otherwise it oscillates for many minutes.


Hi there Dale,

      Can you damp the motion by attaching a rod(s) with a disk on the end down from the mas s and dipping it into an oilbath? You do need the weight to be critically damped - if you push the mass down a tiny bit, it sho uld return to the rest position, but it should not oscillate at all. Sorry, but I very much doubt if the stick and slip frictio n given by the felt will be satisfactory. Suggest you use a brass weight for your next version. It has a relative density of 8. 5, so you can submerge the whole mass into mineral oil which has a relative density of ~0.9, with not much loss of weight. Al h as a relative density of only 2.7, so submerging it would reduce the weight to ~1.8 / 2.7 times the weight in air. You do need to submerge the weight or the surface tension will probably pull it up against the cylinder wall.

      Good luck!

      Chris Chapman Subject: short OT From: Ron Thompson rlthompson@................. Date: Fri, 14 Sep 2001 11:52:05 -0230 I don't have a number, but I believe that tens of thousands, (over 10,000 alone here in Gander, which has a population ~ 12,000), of passengers have been stranded in Newfoundland alone. Flights began to leave from here yesterday, but not necessarily toUS destinations, the aircraft that were based in Europe were returning to Europe and I believe aircraft belonging to US airlines will continue on to the US, hopefully in a few days. The volunteers I worked with have in no way felt imposed upon, personally I have enjoyed our guests under these trying times. Yesterday the 300 guests in our small college took up a collection, gathered together, and presented it to my boss, the college director, (to be set aside for a student scholarship in memory of the passengers accommodated there). As people spoke (there were multiple languages, and nations represented) we could not keep back the tears as we reflected on how this experience had changed us, how close we had become, and how all of us who had started out as strangers were now supporting each other as we would have our closest family members. The only bitter experience, which left a bad taste in our mouths happened last night. Our group of passengers was bussed to the airport where they were assembled. They were told that they were all to board the aircraft and that it was returning to Paris (not continuing on to Newark). With the doors open to the pouring rain outside, I was told that passengers who refused to return to Paris (the airline would accommodate regular passengers in hotels in Paris until they could be flown to the US) were told they could refuse to board the aircraft but would no longer receive help. I believe I can speak for Newfoundlanders, its not in there nature to leave anyone out in the cold. FWIW, some passengers did refuse to board the aircraft. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Hello From: "wildboar" wildboar@.............. Date: Fri, 14 Sep 2001 10:57:07 -0400 thanks for your input Ron...appreciate it. Patrick ----- Original Message -----=20 From: Ron Westfall=20 To: psn-l@................. Sent: Thursday, July 26, 2001 4:34 PM Subject: RE: Hello The "governing" authority for mines is the State Fire Marshall...and = the laws governing mining are full of loop holes at best. The immediate = problem is that the mine self-monitors their blasting activities through = a subcontractor. First, many in the community do not believe that the = mine always makes aware the State when they are to blast and second, we = do not believe the reported results are accurate. =20 If all you want to do is verify that the monitoring company is = reporting all of the blasts that take place, you could set up your own recording seismograph fairly inexpensively. I would suggest a = geophone, some of Larry Cochrane's electronics, and a PC. Larry sell electronics and geophones through his web page at = www.seismicnet.com. Most of us are using his electronics. The courts would probably accept your evidence for the = occurrence of blasts. =20 Keep in mind that if you try to set up your own equipment, you will = record all sorts of local cultural noise (e.g. cars and trucks passing by on nearby roads) in addition to blasts. Situating = the seismograph away from such noise will reduce the clutter. Even so, you will get some non-blast events. Through = correlation with the blasts that are reported by the monitoring company, you should learn how to distinguish between blast = and non-blast events. =20 If you need to record the strength and any other characteristics of = the blasts such that they could be used in court, I agree with Doug that you would be better to get professional help. By = changing the gain on a seismometer pre-amp, it is easy to create as small or large a trace as you want for a given = event. It would be difficult for an amateur to calibrate the seismometer and maintain the calibration over a period of time to = stand up in court under expert scrutiny. =20 Ron =20
thanks for your input Ron...appreciate=20 it.
 
Patrick
----- Original Message -----
From:=20 Ron = Westfall=20
Sent: Thursday, July 26, 2001 = 4:34=20 PM
Subject: RE: Hello

The "governing" authority for mines = is the State=20 Fire Marshall...and the laws governing mining are full of loop holes = at=20 best.  The immediate problem is that the mine self-monitors their = blasting activities through a subcontractor.  First, many in the=20 community do not believe that the mine always makes aware the = State when=20 they are to blast and second, we do not believe the reported results = are=20 accurate.
 
If all you = want to do=20 is verify that the monitoring company is reporting all of the blasts = that take=20 place, you could set up your
own = recording=20 seismograph fairly inexpensively.  I would suggest a geophone, = some of=20 Larry Cochrane's electronics, and
a = PC.  Larry sell=20 electronics and geophones through his web page at www.seismicnet.com.  Most = of us are=20 using his
electronics.  The=20 courts would probably accept your evidence for the occurrence of=20 blasts.
 
Keep in = mind that if=20 you try to set up your own equipment, you will record all sorts of = local=20 cultural noise (e.g. cars and
trucks = passing by on=20 nearby roads) in addition to blasts.  Situating the seismograph = away from=20 such noise will reduce
the = clutter. =20 Even so, you will get some non-blast events.  Through correlation = with=20 the blasts that are reported by the
monitoring = company,=20 you should learn how to distinguish between blast and = non-blast=20 events.
 
If you need to record the = strength and=20 any other characteristics of the blasts such that they could be used = in court,=20 I
agree with Doug that you would be better to = get=20 professional help.  By changing the gain on a seismometer = pre-amp,=20 it
is=20 easy to create as small or large a trace as you want for a given = event. =20 It would be difficult for an amateur to calibrate
the=20 seismometer and maintain the calibration over a period of time to = stand up in=20 court under expert scrutiny.
 
Ron
 
= Subject: WINQUAKE PROBLEMS From: "Francesco" franuc@...... Date: Sat, 15 Sep 2001 11:01:47 +0200 Hi Larry I found this problems in the last version (2.8.1): REPORT. When I make manually a report on the event (with exactly and = needed coordinates, time, M etc.)and, at last, I add it to the file, = after the "make" command, WQ generates a complex error, showing a series = of a unidentificated number and messages in every boxes of the windows. = I have to close the program and restart it. No problem with internet = report. REPLAY. I use from some years a network configuration (Win95 for SDR 4.1 = and Win2000 in main system). Now, from some days, replay don't work properly. When Sdr, on request, = creates the file, this message it's shown in the bottom of the screen: = "can't open file 010912....., in E:\sdr\events\0109" (< my directory in = main system). These are a mistake of my installation, or a bug? Regards Francesco
Hi Larry
I found this problems in the last = version=20 (2.8.1):
 
REPORT. When I make manually a = report on the=20 event (with exactly and needed coordinates, time, M etc.)and, at last, I = add it=20 to the file, after the "make" command, WQ generates a complex = error,=20 showing a series of a unidentificated number and messages in every boxes = of the=20 windows. I have to close the program and restart it. No problem with internet report.
 
 
REPLAY. I use from some years a network = configuration (Win95 for SDR 4.1 and Win2000 in main = system).
Now, from some days, replay don't work = properly.=20 When Sdr, on request,  creates the file, this message it's shown in = the=20 bottom of the screen: "can't open file 010912....., in = E:\sdr\events\0109" =20 (< my directory in main system).
 
These are a mistake of my = installation, or a=20 bug?
 
Regards
Francesco
Subject: Re: WINQUAKE BETA 2.8-1 From: RADIOTEL@....... Date: Sat, 15 Sep 2001 08:37:16 EDT Possible Bug in Winquake Beta 2.8-1. I am using Windows 2000 with Pentium Computer and HP Laser Jet printer. When attempting to print location map, WQ only prints coordinants. I can save map to file and print from saved file though. Jim Allen Cerritos, Ca. Possible Bug in Winquake Beta 2.8-1.  I am using Windows 2000 with Pentium Computer and HP Laser Jet printer.  When attempting to print location map, WQ only prints coordinants.  I can save ma p to file and print from saved file though.
Jim Allen
Cerritos, Ca. Subject: RE: WINQUAKE PROBLEMS From: "Ron Westfall" westfall@........ Date: Sat, 15 Sep 2001 08:57:47 -0700 Hi Francesco Silly thought ... Any chance the disk drive on your SDR computer is full or nearly full? Ron -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@................. Behalf Of Francesco Sent: Saturday, September 15, 2001 2:02 AM To: PSN Subject: WINQUAKE PROBLEMS Hi Larry I found this problems in the last version (2.8.1): REPORT. When I make manually a report on the event (with exactly and needed coordinates, time, M etc.)and, at last, I add it to the file, after the "make" command, WQ generates a complex error, showing a series of a unidentificated number and messages in every boxes of the windows. I have to close the program and restart it. No problem with internet report. REPLAY. I use from some years a network configuration (Win95 for SDR 4.1 and Win2000 in main system). Now, from some days, replay don't work properly. When Sdr, on request, creates the file, this message it's shown in the bottom of the screen: "can't open file 010912....., in E:\sdr\events\0109" (< my directory in main system). These are a mistake of my installation, or a bug? Regards Francesco
Hi=20 Francesco
 
Silly=20 thought ... Any chance the disk drive on your SDR computer is full or = nearly=20 full?
 
Ron
 
-----Original Message-----
From: = psn-l-request@................. [mailto:psn-l-request@...............On Behalf Of=20 Francesco
Sent: Saturday, September 15, 2001 2:02=20 AM
To: PSN
Subject: WINQUAKE = PROBLEMS

Hi Larry
I found this problems in the last = version=20 (2.8.1):
 
REPORT. When I make manually a = report on the=20 event (with exactly and needed coordinates, time, M etc.)and, at last, = I add=20 it to the file, after the "make" command, WQ generates a complex = error,=20 showing a series of a unidentificated number and messages in every = boxes of=20 the windows. I have to close the program and restart it. No problem with internet report.
 
 
REPLAY. I use from some years a = network=20 configuration (Win95 for SDR 4.1 and Win2000 in main = system).
Now, from some days, replay don't = work properly.=20 When Sdr, on request,  creates the file, this message it's shown = in the=20 bottom of the screen: "can't open file 010912....., in=20 E:\sdr\events\0109"  (< my directory in main = system).
 
These are a mistake of my = installation, or a=20 bug?
 
Regards
Francesco
Subject: Earthquake Swarm in SW British Columbia, Canada From: "Ron Westfall" westfall@........ Date: Sat, 15 Sep 2001 09:09:59 -0700 First of all, my condolences to our American friends. I saw the tragedy as it was happening on TV. Very horrifying and sicken ing to see it play out in real time. For slightly over the last week there has been a swarm of earthquakes off the British Columbia coast on one of the plate bounda ries. Those of you in the Seattle, and maybe the Alaska areas, might be able to pick up the traces on your seismographs. For info see: list: http://www.pgc.nrcan.gc.ca/seismo/recent/swbc.50evt.list.html map: http://www.pgc.nrcan.gc.ca/seismo/recent/swbc.50evt.html Do check the map, its very interesting how they are clustered. Ron __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: R: WINQUAKE PROBLEMS From: "Francesco" franuc@...... Date: Sat, 15 Sep 2001 19:01:50 +0200 Noo, my SDR system is normally empty, purged every 3 days. Francesco ----- Original Message -----=20 From: Ron Westfall=20 To: psn-l@................. Sent: Saturday, September 15, 2001 5:57 PM Subject: RE: WINQUAKE PROBLEMS Hi Francesco =20 Silly thought ... Any chance the disk drive on your SDR computer is = full or nearly full? =20 Ron =20 -----Original Message----- From: psn-l-request@.............. = [mailto:psn-l-request@................. Behalf Of Francesco Sent: Saturday, September 15, 2001 2:02 AM To: PSN Subject: WINQUAKE PROBLEMS Hi Larry I found this problems in the last version (2.8.1): =20 REPORT. When I make manually a report on the event (with exactly and = needed coordinates, time, M etc.)and, at last, I add it to the file, = after the "make" command, WQ generates a complex error, showing a series = of a unidentificated number and messages in every boxes of the windows. = I have to close the program and restart it. No problem with internet = report. REPLAY. I use from some years a network configuration (Win95 for SDR = 4.1 and Win2000 in main system). Now, from some days, replay don't work properly. When Sdr, on = request, creates the file, this message it's shown in the bottom of the = screen: "can't open file 010912....., in E:\sdr\events\0109" (< my = directory in main system). These are a mistake of my installation, or a bug? Regards Francesco
Noo,  my SDR system is normally = empty, purged=20 every 3 days.
 
Francesco
 
----- Original Message -----
From:=20 Ron = Westfall=20
Sent: Saturday, September 15, = 2001 5:57=20 PM
Subject: RE: WINQUAKE = PROBLEMS

Hi=20 Francesco
 
Silly thought ... Any chance the disk drive on your SDR = computer is=20 full or nearly full?
 
Ron
 
-----Original Message-----
From: psn-l-request@............... =20 [mailto:psn-l-request@webtron= ics.com]On=20 Behalf Of Francesco
Sent: Saturday, September 15, 2001 = 2:02=20 AM
To: PSN
Subject: WINQUAKE=20 PROBLEMS

Hi Larry
I found this problems in the last = version=20 (2.8.1):
 
REPORT. When I make manually a = report on=20 the event (with exactly and needed coordinates, time, M etc.)and, at = last, I=20 add it to the file, after the "make" command, WQ generates a = complex=20 error, showing a series of a unidentificated number and messages in = every=20 boxes of the windows. I have to close the program and restart=20 it. No problem with internet=20 report.
 
 
REPLAY. I use from some years a = network=20 configuration (Win95 for SDR 4.1 and Win2000 in main = system).
Now, from some days, replay don't = work=20 properly. When Sdr, on request,  creates the file, this message = it's=20 shown in the bottom of the screen: "can't open file 010912....., in=20 E:\sdr\events\0109"  (< my directory in main = system).
 
These are a mistake of my = installation, or=20 a bug?
 
Regards
Francesco
Subject: Re: winquake feature From: "Larry Cochrane" cochrane@.............. Date: Sat, 15 Sep 2001 14:56:30 -0700 Francesco, Over the last few months I have been working on a Windows version of SDR = (WinSDR). Unfortunately I haven't had much free time to work on this = project. For now make sure this mode is turned off. I will send out an email message in a few days with more information = about WinSDR. -Larry Cochrane Redwood City, PSN ----- Original Message -----=20 From: Francesco=20 To: psn-l@................. Sent: Wednesday, September 12, 2001 3:48 PM Subject: winquake feature Hi Larry. I saw in the new release an option called "winSDR mode" in replay = channel information box. I didn't found any explanation in the help-line. What is this? Regards Francesco
Francesco,
 
Over the last few months I have been = working on a=20 Windows version of SDR (WinSDR). Unfortunately I haven't had much free = time to=20 work on this project. For now make sure this mode = is turned=20 off.
 
I will send out an email message in a = few days with=20 more information about WinSDR.
 
 
-Larry Cochrane
Redwood City, PSN
 
----- Original Message -----
From:=20 Francesco =
Sent: Wednesday, September 12, = 2001 3:48=20 PM
Subject: winquake feature

Hi Larry.
I saw in the new release an option = called "winSDR=20 mode" in replay channel information box.
I didn't found any explanation in the = help-line.
What is this?
 
Regards
Francesco
Subject: Re: WINQUAKE BETA 2.8-1 From: "Larry Cochrane" cochrane@.............. Date: Sat, 15 Sep 2001 15:18:59 -0700 Jim, I just tried it with my system. I am using Win2K and a HP 3100 Laser Jet = printer. It worked fine for me so I'm not sure what the problem could = be? All I can suggest doing is too play around with the printer = settings.=20 -Larry Cochrane Redwood City, PSN ----- Original Message -----=20 From: RADIOTEL@.......... To: psn-l@................. Sent: Saturday, September 15, 2001 5:37 AM Subject: Re: WINQUAKE BETA 2.8-1 Possible Bug in Winquake Beta 2.8-1. I am using Windows 2000 with = Pentium Computer and HP Laser Jet printer. When attempting to print = location map, WQ only prints coordinants. I can save map to file and = print from saved file though.=20 Jim Allen=20 Cerritos, Ca.=20
Jim,
 
I just tried it with my system. I am = using Win2K=20 and a HP 3100 Laser Jet printer. It worked fine for me so I'm not sure = what the=20 problem could be? All I can suggest doing is too play around with the = printer=20 settings.
 
-Larry Cochrane
Redwood City, PSN
----- Original Message -----
From:=20 RADIOTEL@.......=20
Sent: Saturday, September 15, = 2001 5:37=20 AM
Subject: Re: WINQUAKE BETA = 2.8-1

Possible = Bug in=20 Winquake Beta 2.8-1.  I am using Windows 2000 with Pentium = Computer and=20 HP Laser Jet printer.  When attempting to print location map, WQ = only=20 prints coordinants.  I can save map to file and print from saved = file=20 though.
Jim Allen
Cerritos, Ca.=20 Subject: Re: WINQUAKE BETA 2.8-1 From: "Larry Conklin" lconklin@............ Date: Sat, 15 Sep 2001 23:26:32 -0400 I have experienced the same problem with all of the recent versions of = the program. I reported it to Larry some time ago, but he was unable to = duplicate it. I've seen the problem under both Win 95 and Win 98. I = too am using a HP Deskjet (660c) printer, with what I believe is the = most current available driver. Larry Conklin Liverpool, NY ----- Original Message -----=20 From: RADIOTEL@.......... To: psn-l@................. Sent: Saturday, September 15, 2001 8:37 AM Subject: Re: WINQUAKE BETA 2.8-1 Possible Bug in Winquake Beta 2.8-1. I am using Windows 2000 with = Pentium Computer and HP Laser Jet printer. When attempting to print = location map, WQ only prints coordinants. I can save map to file and = print from saved file though.=20 Jim Allen=20 Cerritos, Ca.=20
I have experienced the same problem with all of the = recent=20 versions of the program.  I reported it to Larry some time ago, but = he was=20 unable to duplicate it.  I've seen the problem under both Win 95 = and Win=20 98.  I too am using a HP Deskjet (660c) printer, with what I = believe is the=20 most current available driver.
 
Larry Conklin
Liverpool, NY
 
----- Original Message -----
From:=20 RADIOTEL@.......=20
Sent: Saturday, September 15, = 2001 8:37=20 AM
Subject: Re: WINQUAKE BETA = 2.8-1

Possible = Bug in=20 Winquake Beta 2.8-1.  I am using Windows 2000 with Pentium = Computer and=20 HP Laser Jet printer.  When attempting to print location map, WQ = only=20 prints coordinants.  I can save map to file and print from saved = file=20 though.
Jim Allen
Cerritos, Ca.=20 Subject: WinQuake printing problem From: "Larry Cochrane" cochrane@.............. Date: Sun, 16 Sep 2001 14:28:46 -0700 Larry and others with the problem, Is it just the map page that is not printing correctly? -Larry Cochrane Redwood City, PSN ----- Original Message -----=20 From: Larry Conklin=20 To: psn-l@................. Sent: Saturday, September 15, 2001 8:26 PM Subject: Re: WINQUAKE BETA 2.8-1 I have experienced the same problem with all of the recent versions of = the program. I reported it to Larry some time ago, but he was unable to = duplicate it. I've seen the problem under both Win 95 and Win 98. I = too am using a HP Deskjet (660c) printer, with what I believe is the = most current available driver. Larry Conklin Liverpool, NY ----- Original Message -----=20 From: RADIOTEL@.......... To: psn-l@................. Sent: Saturday, September 15, 2001 8:37 AM Subject: Re: WINQUAKE BETA 2.8-1 Possible Bug in Winquake Beta 2.8-1. I am using Windows 2000 with = Pentium Computer and HP Laser Jet printer. When attempting to print = location map, WQ only prints coordinants. I can save map to file and = print from saved file though.=20 Jim Allen=20 Cerritos, Ca.=20
Larry and others with the = problem,
 
Is it just the map page that is not = printing=20 correctly?
 
-Larry Cochrane
Redwood City, PSN
 
----- Original Message -----
From:=20 Larry=20 Conklin
Sent: Saturday, September 15, = 2001 8:26=20 PM
Subject: Re: WINQUAKE BETA = 2.8-1

I have experienced the same problem with all of = the recent=20 versions of the program.  I reported it to Larry some time ago, = but he=20 was unable to duplicate it.  I've seen the problem under both Win = 95 and=20 Win 98.  I too am using a HP Deskjet (660c) printer, with what I = believe=20 is the most current available driver.
 
Larry Conklin
Liverpool, NY
 
----- Original Message -----
From:=20 RADIOTEL@.......
Sent: Saturday, September 15, = 2001 8:37=20 AM
Subject: Re: WINQUAKE BETA = 2.8-1

Possible = Bug in=20 Winquake Beta 2.8-1.  I am using Windows 2000 with Pentium = Computer and=20 HP Laser Jet printer.  When attempting to print location map, = WQ only=20 prints coordinants.  I can save map to file and print from = saved file=20 though.
Jim Allen
Cerritos, Ca.=20
Subject: WINQUAKE PROBLEMS From: "Francesco" franuc@...... Date: Mon, 17 Sep 2001 00:51:03 +0200 Hi Larry I found this problems in the last version (2.8.1): =20 REPORT. When I make manually a report on the event (with exactly and = needed coordinates, time, M etc.)and, at last, I add it to the file, = after the "make" command, WQ generates a complex error, showing a series = of a unidentificated number and messages in every boxes of the windows. = I have to close the program and restart it. No problem with internet = report. REPLAY. I use from some years a network configuration (Win95 for SDR 4.1 = and Win2000 in main system). Now, from some days, replay don't work properly. When Sdr, on request, = creates the file, this message it's shown in the bottom of the screen: = "can't open file 010912....., in E:\sdr\events\0109" (< my directory in = main system). These are a mistake of my installation, or a bug? Regards Francesco
 
 
Hi Larry
I found this problems in the last = version=20 (2.8.1):
 
REPORT. When I make manually a = report on the=20 event (with exactly and needed coordinates, time, M etc.)and, at last, I = add it=20 to the file, after the "make" command, WQ generates a complex = error,=20 showing a series of a unidentificated number and messages in every boxes = of the=20 windows. I have to close the program and restart it. No problem with internet report.
 
 
REPLAY. I use from some years a network = configuration (Win95 for SDR 4.1 and Win2000 in main = system).
Now, from some days, replay don't work = properly.=20 When Sdr, on request,  creates the file, this message it's shown in = the=20 bottom of the screen: "can't open file 010912....., in = E:\sdr\events\0109" =20 (< my directory in main system).
 
These are a mistake of my = installation, or a=20 bug?
 
Regards
Francesco
Subject: Re: WinQuake printing problem From: RADIOTEL@....... Date: Sun, 16 Sep 2001 19:01:14 EDT Larry Yes its just the map page that does not print. Jim Allen Larry
Yes its just the map page that does not print.
Jim Allen Subject: Re: detector design From: "Charles R. Patton" charles.r.patton@........ Date: Sun, 16 Sep 2001 16:31:39 -0700 Chris, Sorry for the slow response -- I just returned from a business trip. Personally, I'm not aware of anyone using using the NE5521 chip and I've never used it myself, so I'm not much help in this department. Regards, Chas. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: WinQuake printing problem From: "Larry Conklin" lconklin@............ Date: Sun, 16 Sep 2001 21:01:13 -0400 Larry Yes. My experience seems to be exactly the same as Jim Allen's = description. I get the cursor coordinate text, etc from the left hand = side of the screen, and a blank area where the map graphic should be. I = have no problem whatsoever in printing from the main data display page. Larry Conklin ----- Original Message -----=20 From: Larry Cochrane=20 To: psn-l@................. Sent: Sunday, September 16, 2001 5:28 PM Subject: WinQuake printing problem Larry and others with the problem, =20 Is it just the map page that is not printing correctly? =20 -Larry Cochrane Redwood City, PSN =20 ----- Original Message -----=20 From: Larry Conklin=20 To: psn-l@................. Sent: Saturday, September 15, 2001 8:26 PM Subject: Re: WINQUAKE BETA 2.8-1 I have experienced the same problem with all of the recent versions = of the program. I reported it to Larry some time ago, but he was unable = to duplicate it. I've seen the problem under both Win 95 and Win 98. I = too am using a HP Deskjet (660c) printer, with what I believe is the = most current available driver. Larry Conklin Liverpool, NY ----- Original Message -----=20 From: RADIOTEL@.......... To: psn-l@................. Sent: Saturday, September 15, 2001 8:37 AM Subject: Re: WINQUAKE BETA 2.8-1 Possible Bug in Winquake Beta 2.8-1. I am using Windows 2000 with = Pentium Computer and HP Laser Jet printer. When attempting to print = location map, WQ only prints coordinants. I can save map to file and = print from saved file though.=20 Jim Allen=20 Cerritos, Ca.=20
Larry
 
Yes.  My experience seems to be exactly the = same as Jim=20 Allen's description. I get the cursor coordinate text, etc from the left = hand=20 side of the screen, and a blank area where the map graphic should = be.  I=20 have no problem whatsoever in printing from the main data display=20 page.
 
Larry Conklin
----- Original Message -----
From:=20 Larry=20 Cochrane
Sent: Sunday, September 16, = 2001 5:28=20 PM
Subject: WinQuake printing = problem

Larry and others with the = problem,
 
Is it just the map page that is not = printing=20 correctly?
 
-Larry Cochrane
Redwood City, PSN
 
----- Original Message -----
From:=20 Larry=20 Conklin
To: psn-l@..............
Sent: Saturday, September 15, = 2001 8:26=20 PM
Subject: Re: WINQUAKE BETA = 2.8-1

I have experienced the same problem with all of = the recent=20 versions of the program.  I reported it to Larry some time ago, = but he=20 was unable to duplicate it.  I've seen the problem under both = Win 95=20 and Win 98.  I too am using a HP Deskjet (660c) printer, with = what I=20 believe is the most current available driver.
 
Larry Conklin
Liverpool, NY
 
----- Original Message ----- =
From:=20 RADIOTEL@.......
To: psn-l@..............
Sent: Saturday, September = 15, 2001=20 8:37 AM
Subject: Re: WINQUAKE BETA=20 2.8-1

Possible Bug in=20 Winquake Beta 2.8-1.  I am using Windows 2000 with Pentium = Computer=20 and HP Laser Jet printer.  When attempting to print location = map, WQ=20 only prints coordinants.  I can save map to file and print = from saved=20 file though.
Jim Allen
Cerritos, Ca.=20
Subject: Re: WINQUAKE PROBLEMS From: "Larry Cochrane" cochrane@.............. Date: Sun, 16 Sep 2001 18:57:53 -0700 Francesco, >Hi Larry >I found this problems in the last version (2.8.1): >REPORT. When I make manually a report on the event (with exactly and needed coordinates, >time, M etc.)and, at last, I add it to the file, after the "make" command, WQ generates a >complex error, showing a series of a unidentificated number and messages in every boxes >of the windows. I have to close the program and restart it. No problem with internet report. I did find a problem with the Event Dialog box that maybe the problem you are reporting. I could get WQ too crash if I used the Make Event report and then use the Add Event report in another event file Window. >REPLAY. I use from some years a network configuration (Win95 for SDR 4.1 >and Win2000 in main system). Now, from some days, replay don't work properly. >When Sdr, on request, creates the file, this message it's shown in the bottom >of the screen: "can't open file 010912....., in E:\sdr\events\0109" >(< my directory in main system). This works fine for me and I haven't received any other reports of a problem with replay. All I can suggest you do is delete the file called replay.dat and reenter your replay settings. Make sure you have the WinSDR mode turned off. I will have a new beta release ready in a few days. I am now looking into the map printing problem. -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: WinQuake printing problem From: George Bush gbush@....... Date: Mon, 17 Sep 2001 10:16:32 -0700 At 02:28 PM 9/16/01 -0700, you wrote: >>>> Larry and others with the problem, Is it just the map page that is not printing correctly? -Larry Cochrane Redwood City, PSN Yes, I also have that problem currently, and it appeared with your previous version of Winquake and my previous win 95 system with a HP deskjet 500c printer. I still see the problem with win 98 on my new pentium computer and a new HP deskjet 932c printer, so it seems to be independant of hardware or of operating system. When I try to print I get a box that says- "Winq32 An error has occurred in your program. To keep working anyway, click [Ignore] and save your work in a new file. To quit this program, click [Close]. You will lose information youentered since your last save." When I clicked [Close] I got a box that said- "Winqck32 Illegal operation and shutdown," which I presume is a general protection fault. If I don't print, but try to save the map file I get the message- "Error making GIF image. Error: Unsupported bits/pixel = 24." I hope that this helps with your troubleshooting. George Subject: New SDR Feature Request From: "Ron Westfall" westfall@........ Date: Mon, 17 Sep 2001 10:45:26 -0700 Hi For the last week I have been tracking a swarm of earthquakes off the southwest British Columbia coast. In some cases, the earthquakes have occurred so close together that their traces overlap. Most of these quakes are nearish the limit of my abilit y to detect, so when the traces overlap it is hard to detect the onset of the second quake. I use times published by the USGS and t he Geological Survey of Canada and estimated travel times to help identify the onset of the second quake. Larry, it would be easier to find onsets if the SDR Replay Mode window had a fixed ruler with tick marks every 1 second or some other appropriate interval for the selected time coordinate scale. The ruler doesn't need labels on the tick marks, just tick marks at an easy to figure out interval. The ruler could be displayed in the same color as the Replay Mode heading (white by default ). What do you think? What does everybody else think? Ron __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: WinQuake printing problem From: "Larry Conklin" lconklin@............ Date: Mon, 17 Sep 2001 14:30:49 -0400 Larry, This description of the problem is different from what I am = experiencing. I do not get any sort of error message at all (I am using = Win 98SE). Just tried another map to be sure exactly what printed and = what didn't. I got the textual info for "Station" and "Event", but = nothing for the cursor coordinates. The stuff that showed up included = the category headers and all data items correctly. No header or = parameters for the cursor info. Also, the stuff that printed showed up = in the top left corner of the page, and did not leave any room for the = missing cursor coordinates data. Apart from what did print, the page = was blank. I had the default scaling for the full globe selected for = display at the time I attempted the print. Hope this helps. This glitch may fall in the "interesting" category. Larry Conklin ----- Original Message -----=20 From: George Bush=20 To: psn-l@................. Sent: Monday, September 17, 2001 1:16 PM Subject: Re: WinQuake printing problem At 02:28 PM 9/16/01 -0700, you wrote:=20 >>>> Larry and others with the problem, Is it just the map page that is not printing correctly? -Larry Cochrane Redwood City, PSN Yes, I also have that problem currently, and it appeared with your = previous version of Winquake and my previous win 95 system with a HP = deskjet 500c printer. I still see the problem with win 98 on my new = pentium computer and a new HP deskjet 932c printer, so it seems to be = independant of hardware or of operating system.=20 When I try to print I get a box that says-=20 "Winq32=20 An error has occurred in your program. To keep working anyway, click = [Ignore] and save your work in a new file. To quit this program, click = [Close]. You will lose information youentered since your last save."=20 When I clicked [Close] I got a box that said-=20 "Winqck32=20 Illegal operation and shutdown,"=20 which I presume is a general protection fault. If I don't print, but = try to save the map file I get the message- "Error making GIF image. = Error: Unsupported bits/pixel =3D 24." I hope that this helps with your troubleshooting. George=20
Larry,
 
This description of the problem is different from = what I am=20 experiencing.  I do not get any sort of error message at all (I am = using=20 Win 98SE).  Just tried another map to be sure exactly what printed = and what=20 didn't.  I got the textual info for "Station" and "Event", but = nothing for=20 the cursor coordinates.  The stuff that showed up included the = category=20 headers and all data items correctly.  No header or parameters for = the=20 cursor info.  Also, the stuff that printed showed up in the top = left corner=20 of the page, and did not leave any room for the missing cursor = coordinates=20 data.  Apart from what did print, the page was blank.  I had = the=20 default scaling for the full globe selected for display at the time I = attempted=20 the print.
 
Hope this helps.  This glitch may fall in the=20 "interesting" category.
 
Larry Conklin
 
 
----- Original Message -----
From:=20 George Bush =
Sent: Monday, September 17, = 2001 1:16=20 PM
Subject: Re: WinQuake printing=20 problem

At 02:28 PM 9/16/01 -0700, you wrote: =
>>>>
Larry and others with the problem,

Is it just the = map=20 page that is not printing correctly?

-Larry = Cochrane
Redwood City,=20 PSN

Yes, I also have that problem currently, and = it=20 appeared with your previous version of Winquake and my previous win 95 = system=20 with a HP deskjet 500c printer. I still see the problem with win 98 on = my new=20 pentium computer and a new HP deskjet 932c printer, so it seems to be=20 independant of hardware or of operating system.

When I try to = print I=20 get a box that says-

"Winq32
An error has occurred in your = program. To keep working anyway, click [Ignore] and save your work in = a new=20 file. To quit this program, click [Close]. You will lose information=20 youentered since your last save."

When I clicked [Close] I got = a box=20 that said-

"Winqck32
Illegal operation and shutdown,"=20

which I presume is a general protection fault. If I don't = print, but=20 try to save the map file I get the message- "Error making GIF image. = Error:=20 Unsupported bits/pixel =3D 24."

I hope that this helps with = your=20 troubleshooting.


George Subject: WTC Collapse From: "Nick & Sophie Caporossi" nickcap@............. Date: Mon, 17 Sep 2001 15:58:44 -0400 Hi All: I posted the World Trade Center Disaster. Most of my Sensors detected = them. Even the SG (Low) showed somewhat of a spike at that time. It's = at: 09/11/01 at 13:59 hours UTC. Just a few days before the family and I were at the Windows on the world = for lunch on the 102 floor. Nick
Hi All:
 I posted the World Trade Center = Disaster.=20 Most of my Sensors detected them. Even the SG (Low) showed somewhat = of a=20 spike at that time. It's at:
09/11/01 at 13:59 hours = UTC.
 
Just a few days before the family and I = were at the=20 Windows on the world for lunch on the 102 floor.
 
 
 Nick
Subject: Re: New SDR Feature Request From: Bill DiCarlo ka2qep@........... Date: Mon, 17 Sep 2001 19:02:06 -0400 Hello everyone, I would like to see sdr view 2 channels at once, or alternate between them. I wonder if that is possible? When I view 1 channel then check the other, sometimes I lose the trace and I have to replay it. I would like to be able to switch back and forth between channels and not lose the trace. Regards to all, Bill DiCarlo Ron Westfall wrote: > > Hi > > For the last week I have been tracking a swarm of earthquakes off the southwest British Columbia coast. In some cases, the > earthquakes have occurred so close together that their traces overlap. Most of these quakes are nearish the limit of my abil ity to > detect, so when the traces overlap it is hard to detect the onset of the second quake. I use times published by the USGS and the > Geological Survey of Canada and estimated travel times to help identify the onset of the second quake. > > Larry, it would be easier to find onsets if the SDR Replay Mode window had a fixed ruler with tick marks every 1 second or so me > other appropriate interval for the selected time coordinate scale. The ruler doesn't need labels on the tick marks, just tic k marks > at an easy to figure out interval. The ruler could be displayed in the same color as the Replay Mode heading (white by defau lt). > What do you think? What does everybody else think? > > Ron > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Remote acquisition From: barry lotz gbl@....... Date: Wed, 19 Sep 2001 17:27:13 -0700 Hi All I have been interested for quite a while in acquiring data from a remote station via the cell phone and download software or better yet the internet. Is this something that could be somewhat standardized in this group for those of us who have limited knowledge of the internet and communications workings? It would be kind of "cool" if one could double click on the psn world map and see the latest hours from that site. Each individual could select his/her "best" sensor to show (I have no idea about the security issue) like the USGS helicorder site. I don't know if it would be even possible. Just a thought. Along the same line, how would I find out how to acquire my data from a remote site I would have? The site would have a cell phone and modem. I didn't want to pay thousands of dollars for hardware and software. I have had people discuss the use of Dos/Windows software to download data and this is probably the easy way to go. If ones site is several miles away would the internet be better wrt long distance charges? Any thoughts? Regards Barry __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Virus alert - I got hit From: "Larry Cochrane" cochrane@.............. Date: Wed, 19 Sep 2001 20:47:12 -0700 All, As I'm sure most of you know there is a new virus / worm going around called Nimda Worm. Unfortunately my NT Server got infected with this worm causing lots of problems. My system has been off-line for over 24 hours now as I try and remove the worm from the system. Currently my Web server is turned off. I will be turning it back on again in a few minutes. Hopefully the system won't get re infected as the source of infection was Microsoft's Web server. I did not run any programs. This one automatically ran because M$'s Web server had a hole in it that could be exploited and used to run a program that the worm uploads to the server. The program then spreads the worm to the system etc. It modified all of my html pages by placing a little Java Script at the end of each file and corrupted a lot of other files. User accessing my PSN site would be asked if they want to download a file called "readme.exe". If the user did download it and ran the program, the worm would spread again. For more information on the nasty worm see http://www.cert.org/advisories/CA-2001-26.html. I have installed all of the hotfixes from Micro$oft so hopefully this worm won't effect my system again. Regards, Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Remote acquisition From: "Francesco" franuc@...... Date: Thu, 20 Sep 2001 08:31:13 +0200 Hi Barry. I'm using, for some of our station's in Italy, CarbonCopy32 to connect and control a remote system. You can download and upload file, start and stop programs and many other features. But It runs only under Windows 9x, NT, 2000. Then you have use a telephon line and a modem. This is the better mode and no require an expansive cost..... Regards Francesco __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Update From: "Larry Cochrane" cochrane@.............. Date: Thu, 20 Sep 2001 21:14:55 -0700 All, In case you didn't get my last message I will repeat that my NT 4.0 Server got hit bad with the new virus / worm going around. See www.cert.org for more information. After recovering from the first infection I installed the hotfixes suggested by Micr$oft and turned on the web server. Within seconds my system got re infected. After reinstalling the OS again I found more info on M$ web site on how to stop this worm from getting into my system. As far as I can tell I have everything working again. This is the first time I have ever had a problem like this. What a pain..... If you see or have any problems with my web site (www.seismicnet.com) or the event file email address please let me know ASAP in a private email. Thanks, -Larry Cochrane __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: New SDR Feature Request From: "Larry Cochrane" cochrane@.............. Date: Thu, 20 Sep 2001 21:20:37 -0700 Ron Westfall wrote: > Larry, it would be easier to find onsets if the SDR Replay Mode window had > a fixed ruler with tick marks every 1 second or some other appropriate interval >for the selected time coordinate scale. The ruler doesn't need labels on the tick >marks, just tick marks Since SDR is a DOS program it is limited on how much memory it can use. At this I can't add any new features without removing others. This is why I am working on a Windows version of SDR. Now if I could only find time to work on it.... -Larry Cochrane Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Update From: ian ian@........... Date: Thu, 20 Sep 2001 18:23:21 -1000 Hi, Glad to see your site is back up. I run my webserver on a linux machine (appachie). I'm getting attacks every few seconds from this worm, but being linux, it just harmlessly bounces off. It was the same with Code Red. Perhaps it might be an idea to use a linux server? Red Hat 7 is a breeze to set up. cheers Ian Smith http://www.iasmith.com/quakes.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Update From: "Larry Cochrane" cochrane@.............. Date: Thu, 20 Sep 2001 21:32:20 -0700 Ian, Believe me over the past few days I have thought about it. The problem is I have a few programs running as services that do various tasks on my server. Handling the new event files from PSN stations is one of them. All would have to be re written and I have no programming experience under Linux. While I would love to do it, I just don't have the time to get past the learning curve... -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "ian" To: Sent: Thursday, September 20, 2001 9:23 PM Subject: Re: Update > Hi, > > Glad to see your site is back up. > > I run my webserver on a linux machine (appachie). I'm getting attacks every few > seconds from this worm, but being linux, it just harmlessly bounces off. It was > the same with Code Red. > > Perhaps it might be an idea to use a linux server? Red Hat 7 is a breeze to set > up. > > cheers > > Ian Smith > > http://www.iasmith.com/quakes.htm > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Update From: ian ian@........... Date: Thu, 20 Sep 2001 18:37:09 -1000 Hi, I know what you mean. Just a thought - I'm not volunteering to write anything - but your programs could still run on windows exactly as they are. Don't tell any hackers out there, but, my server, running on my linux machine, is actually using the disk on my windows (gateway) machine. Ie my website is entirely resident on my Windows disk, but the server is running on the linux machine. Again, just a thought. Ian Smith http://www.iasmith.com/quakes.htm __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: New SDR Feature Request From: "Larry Cochrane" cochrane@.............. Date: Thu, 20 Sep 2001 22:51:47 -0700 Bill, While I can't add the feature of displaying more then one channel at a time, see my last email message about limited memory, I will look into the switching between channels problem. -Larry Cochrane Redwood City, PSN ----- Original Message ----- From: "Bill DiCarlo" To: Sent: Monday, September 17, 2001 4:02 PM Subject: Re: New SDR Feature Request > Hello everyone, > > I would like to see sdr view 2 channels at once, or alternate between > them. I wonder if that is possible? When I view 1 channel then check the > other, sometimes I lose the trace and I have to replay it. I would like > to be able to switch back and forth between channels and not lose the > trace. > > Regards to all, > > Bill DiCarlo __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: War-time GPS From: ian ian@........... Date: Sun, 23 Sep 2001 14:35:02 -1000 I've heard that the US military can, in times of conflict, alter/whatever the information from the GPS satellites. It may only be a regional effect near the area of conflict. I'm wondering if it's worth folks keeping an eye on their gps time settings particularly near the middle east (Italy PSN station?) I Smith __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: "Francesco" franuc@...... Date: Mon, 24 Sep 2001 02:40:58 +0200 It's possible, but the region more indicated for any alteration is the central and western Asia and Arabian penisula. Until now all seems works properly. Francesco - Italy __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: Ron Thompson rlthompson@................. Date: Sun, 23 Sep 2001 22:18:10 -0230 Yes, this is true, and its called selective availability. I'm not sure how much the time may be out, but the short term position accuracy will be off, as you've mentioned, in a particular region or regions. Ron (Gander, NF) ian wrote: > I've heard that the US military can, in times of conflict, alter/whatever the > information from the GPS satellites. It may only be a regional effect near the > area of conflict. I'm wondering if it's worth folks keeping an eye on their gps > time settings particularly near the middle east (Italy PSN station?) > > I Smith > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: ian ian@........... Date: Sun, 23 Sep 2001 14:48:58 -1000 Good to hear all is well - so far. It may be though that it only happens as they are about to engage(?). Might be an interesting indicator?. Perhaps a programme to monitor the time difference between gps time and the pc's clock could be illuminating. cheers I Smith Francesco wrote: > It's possible, but the region more indicated for any alteration is the > central and western Asia and Arabian penisula. > Until now all seems works properly. > > Francesco - Italy > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: bc bruce@....... Date: Sun, 23 Sep 2001 20:51:06 -0400 Actually, they stopped dithering it a couple years ago and I believe currently it operates pretty close to optimal. Bruce At 02:35 PM 9/23/2001 -1000, you wrote: >I've heard that the US military can, in times of conflict, alter/whatever the >information from the GPS satellites. It may only be a regional effect >near the >area of conflict. I'm wondering if it's worth folks keeping an eye on >their gps >time settings particularly near the middle east (Italy PSN station?) > >I Smith > > >__________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email PSN-L-REQUEST@.............. with >the body of the message (first line only): unsubscribe >See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: War-time GPS From: "Bob Hancock" robert.hancock@........... Date: Sun, 23 Sep 2001 20:55:43 -0400 I guess a question is in order: Does the timing accuracy required for amateur seismology exceed the time differential needed to offset a GPS position about 100 M, the about of displacement you get when the GPS is degraded. I do not know, but I am certain someone out there probably does...... Bob Hancock -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@................. Behalf Of ian Sent: Sunday, September 23, 2001 20:49 To: psn-l@.............. Subject: Re: War-time GPS Good to hear all is well - so far. It may be though that it only happens as they are about to engage(?). Might be an interesting indicator?. Perhaps a programme to monitor the time difference between gps time and the pc's clock could be illuminating. cheers I Smith Francesco wrote: > It's possible, but the region more indicated for any alteration is the > central and western Asia and Arabian penisula. > Until now all seems works properly. > > Francesco - Italy > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: ChrisAtUpw@....... Date: Sun, 23 Sep 2001 21:05:05 EDT Don't really see why the clocks should be off far enough to notice. More likely to be the random jitter on the position fixes which died out a couple of years ago. Also airliners are using it now, so it is unlikely to be seriously degraded. But do the Afghans use it? Would expect it to be operating at max. efficiency all the time. Won't it be needed for any air strikes? If it was turned on and off, wouldn't that give a warning to the other side? But 100 m at the speed of light is about 1/3 micro second --- don't think my seis equipment would know the difference. Regards, Chris Chapman      Don't really see why the clocks should be off fa r enough to notice. More likely to be the random jitter on the position fixes which died out a couple of years ago. Also airlin ers are using it now, so it is unlikely to be seriously degraded. But do the Afghans use it? Would expect it to be operating at max. efficiency all the time. Won't it be needed for any air strikes? If it was turned on and off, wouldn't that give a warnin g to the other side? But 100 m at the speed of light is about 1/3 micro second --- don't think my seis equipment would know the difference.

      Regards,

      Chris Chapman Subject: RE: War-time GPS From: Jim Hannon jmhannon@........ Date: Sun, 23 Sep 2001 20:27:58 -0500 I am not sure the selective avaliability affects the time of the GPS but lets look at the wost case and say the time error causes the postion error. The speed of light is 300,000,000 meters per second so the maximum time error could be 0.33 microsecond. Not much to worry about for seismic work. At 08:55 PM 9/23/01 -0400, you wrote: >I guess a question is in order: > >Does the timing accuracy required for amateur seismology exceed the time >differential needed to offset a GPS position about 100 M, the about of >displacement you get when the GPS is degraded. > >I do not know, but I am certain someone out there probably does...... > >Bob Hancock Jim Hannon http://soli.inav.net/~jmhannon/ 42,11.90N,91,39.26W WB0TXL __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: Keith Payea kpayea@........... Date: Sun, 23 Sep 2001 18:33:59 -0700 The company I work for makes GPS based clocks. We care about Selective = Availability because we are trying to get accuracy down near 10 or 20 = nS. Even with it on, it just brings the uncertainty in the time to +- = 200ns RMS or so. I know I can't pick a P or S time anywhere near that = accurately! We watched to see if SA got turned on last week, but it = didn't. The current thinking in military circles is to use "regional = jamming" They just use standard electronic countermeasure techniques to = jam the civilian portion of the GPS signal in the area they care about. = That way truckers in Ohio still know which parking spot they're in, even = if there's a war going on in the Middle East. Keith ----- Original Message -----=20 From: ChrisAtUpw@.......... To: psn-l@................. Sent: Sunday, September 23, 2001 6:05 PM Subject: Re: War-time GPS Don't really see why the clocks should be off far enough to = notice. More likely to be the random jitter on the position fixes which = died out a couple of years ago. Also airliners are using it now, so it = is unlikely to be seriously degraded. But do the Afghans use it? Would = expect it to be operating at max. efficiency all the time. Won't it be = needed for any air strikes? If it was turned on and off, wouldn't that = give a warning to the other side? But 100 m at the speed of light is = about 1/3 micro second --- don't think my seis equipment would know the = difference.=20 Regards,=20 Chris Chapman=20
The company I work for makes GPS based=20 clocks.  We care about Selective Availability because we are trying = to get=20 accuracy down near 10 or 20 nS.  Even with it on, it just brings = the=20 uncertainty in the time to +- 200ns RMS or so.  I know I can't pick = a P or=20 S time anywhere near that accurately!  We watched to see if SA got = turned=20 on last week, but it didn't.  The current thinking in military = circles is=20 to use "regional jamming"  They just use standard electronic = countermeasure=20 techniques to jam the civilian portion of the GPS signal in the area = they care=20 about.  That way truckers in Ohio still know which parking spot = they're in,=20 even if there's a war going on in the Middle East.
 
    Keith
 
----- Original Message -----
From:=20 ChrisAtUpw@.......
Sent: Sunday, September 23, = 2001 6:05=20 PM
Subject: Re: War-time GPS

     Don't really see why the clocks = should be=20 off far enough to notice. More likely to be the random jitter on the = position=20 fixes which died out a couple of years ago. Also airliners are using = it now,=20 so it is unlikely to be seriously degraded. But do the Afghans use it? = Would=20 expect it to be operating at max. efficiency all the time. Won't it be = needed=20 for any air strikes? If it was turned on and off, wouldn't that give a = warning=20 to the other side? But 100 m at the speed of light is about 1/3 micro = second=20 --- don't think my seis equipment would know the difference.=20

      Regards,=20

      Chris Chapman=20 Subject: War-time GPS From: David Sarraf david.sarraf@............ Date: Mon, 24 Sep 2001 21:01:43 -0400 The GPS time signal is used to synchronize transmissions of packets from the base stations to the mobile phones. This keeps th e phone and base station synchronized to minimize collisions with packets from other phones using the same base or cell. Prope r time synchronization between bases is important to avoid dropouts when handing off a phone from one base station to another. There would likely be a loud protest if the GPS signal was degraded so much that it caused the cell system to quit working. Co nversely, it is unlikely that the cell phone folks would build a system on something that was by definition selectively availab le. Perhaps even the degraded signal is good enough for them. If so I would think it is also good enough for seismographic da ta logging. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: "Erich Kern" efkern@............. Date: Mon, 24 Sep 2001 18:40:35 -0700 A loud protest you say? Do you not realise we are at war after all. ----- Original Message ----- From: "David Sarraf" To: Sent: Monday, September 24, 2001 6:01 PM Subject: War-time GPS The GPS time signal is used to synchronize transmissions of packets from the base stations to the mobile phones. This keeps the phone and base station synchronized to minimize collisions with packets from other phones using the same base or cell. Proper time synchronization between bases is important to avoid dropouts when handing off a phone from one base station to another. There would likely be a loud protest if the GPS signal was degraded so much that it caused the cell system to quit working. Conversely, it is unlikely that the cell phone folks would build a system on something that was by definition selectively available. Perhaps even the degraded signal is good enough for them. If so I would think it is also good enough for seismographic data logging. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: War-time GPS From: "bobshannon.org" earth@........... Date: Mon, 24 Sep 2001 18:51:49 -0700 It has been common knowledge that GPS was off by 100 yards until last I heard in 07/2000. I did hear that 'gummint was going to correct it because other services were around (Russian etal)....but they may have changed those setting...They can alter it "at will" ya know...There are many other ways to sync XMT besides GPS and just as accurate. Bob ----- Original Message ----- From: David Sarraf > The GPS time signal is used to synchronize transmissions of packets from the base stations to the mobile phones. This keeps the phone and base station synchronized to minimize collisions with packets from other phones using the same base or cell. Proper time synchronization between bases is important to avoid dropouts when handing off a phone from one base station to another __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Auroral light show expected From: Seisguy@....... Date: Tue, 25 Sep 2001 17:41:38 EDT Hello all, I remember all the e-mails we did talking about the last solar flare...here comes another. Mike Click here: BBC News | SCI/TECH | Auroral light show expected Hello all,

I remember all the e-mails we did talking about the last solar flare...here comes another.

Mike

Click here: BBC News | SCI/TECH | Auroral li ght show expected