PSN-L Email List Message
Subject: Re: Really low stuff
From: Brett Nordgren brett3nt@.............
Date: Tue, 29 Sep 2009 21:18:57 -0400
That's what I'm hoping someone knows more about than I do. I posted a gif=
image of what we were seeing at:
The peak amplitude appears to be about 1um/s. Since at 180 seconds the 50=
sec. instrument response is down by a factor of roughly 13, the actual peak=
ground velocity must have been somewhere around 13um/sec implying a peak=20
displacement of about 0.37 mm.
At 12:44 AM 9/30/2009 +0000, you wrote:
>What was the signal that you where seeing ?
> > Hi all,
> > As the Samoa quake was winding down, at about 23:04 UCT on the 50 sec
> > vertical we see a very clear ~180 second signal that lasts for about=
> > an hour. On the Trillium 120 Z channel it's much bigger. What's going
> > on? Is that what I think it is?
> > Brett
Watch our wiggles
or watch some very very good wiggles
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