PSN-L Email List Message

Subject: Re: Homade Geophone
From: John or Jan Lahr JohnJan@........
Date: Fri, 05 Aug 2005 23:24:12 -0700

I've posted some pictures of a 1 Hz vertical seismometer that leaves 
a lot to be desired but is relatively quick and easy to build: .  If it does a reasonable job 
of recording earthquakes I'll post added details.



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