PSN-L Email List Message
Subject: My new tiltmeter detected it's first quake
From: George Bush ke6pxp@.......
Date: Mon, 09 May 2005 22:10:42 -0700
I am in the last stages of completing a new instrument here at Sea Ranch,
CA, and a nice quake came along and I was able to see it on the
The quake was:
M4.4 64km from Sea Ranch, CA USA, 5 km ( 3 mi) ESE of The Geysers, CA
and the PSN server tiltmeter files are:
left This actually shows the P and S arrivals,
but the quality is terrible as the quake sloshes the mercury and this is
a high-Q oscillation. Oh well, I built it to detect Earth tides primarily
and any quake detection is just icing on the cake.
leftThis is a longer time plot of the above
and I am not certain, but it looks like the ground maybe changed tilt
when the quake arrived???
If this project is of interest to you, go to my website at
http://ntweb.mcn.org/gbush and click on The "Tiltmeter Project" and you
can see my writeup and pictures on the construction of the instrument.
Sea Ranch, CA, USA
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