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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#################################/ Emeritus Seismologist 

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