PSN-L Email List Message
Subject: Re: Geophones
From: Alexandr Yagodin midia@..............
Date: Mon, 25 Jul 2005 00:19:06 +0200
25/07 7:00- 9:00 (Gr. t) M 6 - 6,5 Indonezia
----- Original Message -----
From: "Doug Crice"
Sent: Sunday, July 24, 2005 10:45 PM
Subject: RE: Geophones
> When I said Larry's were the best choice, I thought you were recording
> earthquakes, not doing exploration seismic.
> For earthquakes, you need lower natural frequencies and 3-component in a
> triax package. For exploration, you need something higher, maybe 10 to 28
> Hz in what we call a "land case" with a spike. New, they are about $30
> the basic element and $60 in a case with leads attached.
> Naturally, they are cheaper used, but you have to scratch around. If they
> are oil exploration surplus, they come in multiple phones wired in series
> parallel (designed to filter out surface waves). You can take them apart
> and use the individual phones. This is the cheapest source.
> You can find these "geophone strings" and single phones at
> Doug Crice http://www.geostuff.com
> Wireless Seismic http://www.wirelessSeismic.com
> 12996 Somerset Drive phone 1-530-274-4445
> Grass Valley, CA 95945 USA fax 1-530-274-4446
> 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)
[ Top ]
[ Back ]
[ Home Page ]