PSN-L Email List Message
Subject: Re: How much movement
From: Steinar Midtskogen steinar@.............
Date: Wed, 31 Dec 2008 14:15:45 +0100
> Check out the various pages and tables at http://jclahr.com/science/psn/
Thanks for the link. It means that roughly 1 micron amplitude is
needed for my SEP seismometer to produce a clear signal. If I had a
better less noisy site for it, I guess I could make out movements of a
few 100 nanometers.
To detect a movement of 1 micron over 10 seconds sounds pretty
impressive. I'm a bit surprised that this is even possible in a noisy
city. In fact, the greatest noise problem is the ocean, which
sometimes masks out quakes expected to produce 10 micron movements
even if the storm is 500 km away.
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