PSN-L Email List Message
Subject: Re: quake
From: "Thomas Dick" dickthomas01@.............
Date: Fri, 18 Apr 2008 08:37:52 -0500
I see they downgraded the quake to 5.2. I describe it as a "serious" quake
in my first posting. I suppose I based this on passed quakes in this
locality which did not last as long. Certainly this lasted a lot longer.
This one lasted at least 45 seconds e.g. felt for that long. We have lights
on our desks that are suspended. The quake waves continued to vibrate for
over two minutes. I used the word distortion of data. This quake was so
strong and so close. If this were audio, I would describe the incoming data
as being clipped. I saved six aftershocks out of maybe ten or more I
considered significant. At least two were felt and reported by TV listeners
as I watched my computer screen. Lehmans and AS-1 showed tendency toward
peak in the .1 to .3 Hz range five minutes before quake on a relatively
quiet display. And below .1 Hz just seconds before quake. Is that important?
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