PSN-L Email List Message

Subject: Re: Geosource MD-100 geophones
From: Jim ODonnell jimo17@........
Date: Wed, 25 Jun 2003 08:27:19 -0700

Richard- Consider that all geophones roll off like a 2 pole filter-
ie- 12db/oct or 40db/decade
so   10Hz to 1 Hz you have 1/100 attenuatiom
and 10 Hz to 0.1 Hz you have 1/10,000 attenuation
It does not leave much to record.....Jim/UNLV

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