Dear Roberto,

I do not know of a system for recording seismic data with a sound card.
You would not be able to attach the seismic signal directly to the sound
card because the frequency of the seismic signals are too low.  There might
be a way to modulate a higher frequency with the seismic signal and record
that.  However I don't know how one would easily interpret the modulated
signal.

I will send your question to the Public Seismic Network mailing list to
see if one of the members can provide some advice.

A good, inexpensive option for seismic recording uses a Dataq.com
analog to digital converter (AD).  They have one model that sells for just $25
See:  http://dataq.com/194.htm   It connects to the serial port of a PC.

This AD will work with the free AmaSeis software provided by Alan Jones.
See:
http://www.geol.binghamton.edu/faculty/jones/jones.html#AmaSeis

I've posted a lot of information that would be useful for setting up a
seismic station here:
http://jclahr.com/science/psn/epics/links.html

Also, see Larry Cochrane's PSN site:
http://www.seismicnet.com/index.html

Cheers,
John Lahr (from home!)
USGS
Golden, CO


>------ Forwarded Message
>  > From: roberto fichera 
>  > Reply-To: robertofichera1@...........
>  > Date: Thu, 22 May 2003 09:15:26 -0700
>  > To: lisa@........
>  > Subject: italian
>  >
>  >
>  >
>  > I HOPE CHE QUALCUNO CAPISCA L'ITALIANO LI NEGLI U.S.A. PLEASE HELP ME,
>  > BECAUSE I DO NOT WRITE VERY WELL IN ENGLISH.
>  > I WONT A SOFTWARE SEISMOLOGIC RECORDER VIA SOUNDBLASTER WITH MY PERSONAL
>  > COMPUTER.
>  > PENTIUM 3 128 MB OF RAM, HD 40 GB,SOUND BLASTER 128 BIT.
>  >
>  >
>
>------ End of Forwarded Message
>
>
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