PSN-L Email List Message
Subject: Re: Ocean noise ?
From: Thomas Dick dickthomas01@.............
Date: Mon, 06 Apr 2009 14:30:39 -0500
I was watching something between 17:22 and 17:30 here in southern
Indiana USA. I was waiting for an update to the earthquake list which
hasn't shown any new listings since about 13:00. I thought maybe
aftershocks in Italy. I show a minor peak on FFT's around .5 but a much
more pronounced peak at .05 on the Lehmans. What has confused me is the
high "peaks" on FFT's on the 4.5 hz geophones from .05 down to .005.
(Maybe "peaks" aren't the word for it --- but there is a general down
slope from .005 to .5 which isn't there normally....and all the
horizontal units show this trend.) tom d
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