PSN-L Email List Message
Subject: Re: Range of 4,5Hz geophone
From: ian ian@...........
Date: Sun, 08 Jan 2006 12:40:07 +0000
I'm getting an amazing trace on my Lehman of the Greek quake, still in
progress. Interestingly, there is a small event on my geophone which
seems to co-incide with the P wave. Is this likely? See
I'm just about to fit a permanent set of heaters in the box. The
temporary desk lamp has been great since I put it in, cured the problem
completely. I'll have to wait a bit now so as to not disturb the trace
Jón Frímann wrote:
>I do think i found the source of the problem, i think that the ampling
>of the psnamp board was too low. I did change it, but i am not sure how
>much i did change it, it has the jumper on and the gain is from 175 -
>1750. I did turn them clockwise and i think the settings now at maximum
>settings. I see bit more noise then i did before.
>If the range of a 4,5Hz geophone is up to 640 km max, then i problay
>will not have problems picking up most small quakes that happen near me,
>or at least up to 200km away from me.
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