PSN-L Email List Message
Subject: Re: My geophone did pickup mag 7.7 earthquake in siberia
From: Dave Nelson davenn@...............
Date: Sat, 22 Apr 2006 11:18:04 +1000
Hi Ian the mainshock was adjusted down from M7.7 to 7.6
there were 2 x M6.1 aftershocks amongst dozens of other smaller ones
At 07:19 AM 21/04/2006 +0100, you wrote:
>IRIS lists it as a 6.1 but either way, it's sent out a good signal for us
>"northerners". I was able for the first time to test my 2 gain system as
>this quake saturated my 12 bit A/D. I've been recording on 2 channels for
>a while now (the 2nd channel having a lower gain by a factor of 10) and
>for this trace have "stitched" the 2 files together. From the 2 files I
>create 1 file consisting of the non-saturated high gain values and the low
>gain values when the high gain is saturated. The resultant trace is
>excellant and has a resolution of around 15 bits.
>I'll try to post it later.
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