PSN-L Email List Message

Subject: Re: looking for a seismograph
From: John or Jan Lahr JohnJan@........
Date: Tue, 04 Jan 2005 10:41:25 -0700




Dear Tun Aye,

Today very few seismic stations are recorded on a drum recorder.  The
expense of the drum and paper, combined with the daily chore of
changing the paper make this technique much less desirable than
recording digitally with a PC computer.  Also, with digital recording
one can adjust the time and amplitude scales as well as the filter
settings after an earthquake has been recorded.  This is especially 
helpful  in making measurements.

One option that is quite easy to set up would be to purchase an
AS1 instrument for $550.00.  In addition to the instrument you would
need a PC computer running MSWindows and the free software
AmaSeis, which can be downloaded from the web.

There is information on this approach posted here:
http://jclahr.com/science/psn/as1/

Some current records from schools are posted here:
http://jclahr.com/science/psn/as1/heli/allas1.php

Records of the recent M 9.0 Sumatra event are here:
http://jclahr.com/science/psn/as1/indonesia04/as1indo.html

*****
On the other hand, if you want to build your own system, there
is lots of information on the PSN web site:
http://psn.quake.net/

and here:
http://jclahr.com/science/psn/epics/links.html

Best of luck with your seismic recording.
John

At 09:31 AM 1/4/2005, you wrote:
I received this message today
and it is not something I know
anything about.
I hope there is someone
on the list who can answer
this question.  -- Dave

----- Original Message -----
From: <info-dmh@..........>
To: <dsaum@............>
Sent: Tuesday, January 04, 2005 2:44 AM
Subject: looking for a seismograph


Dear Collegues,

Your ewb infiltec.com is very interesting
for me.
I am looking for a seismograph equipment
I hope You may help me to fine
dealer and spec of equipment.

I will be much appreciate if you
could directs me  to a dealer.

I am looking for
 Drum type earthquake recorder
     which capable for detect quake from long distant
     i,e, should not be a strong motion equipment.

Best regards

Tun Aye
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##################################/ John C. Lahr
#################################/ Emeritus Seismologist
################################/ U.S. Geological Survey
===========================/ Geologic Hazards Team, MS966
##############################/ PO Box 25046
#############################//##############################
############################//###############################
     Denver, Colorado 80225-0046 /################################
             Phone: (303) 215-9913 /=============================
               Fax: (303) 273-8540 /##################################
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