PSN-L Email List Message

Subject: Re: Sumatra Quake
From: Thomas Dick dickthomas01@.............
Date: Wed, 11 Jan 2012 09:54:37 -0600


I didn't post this quake. It confused me. Did anyone notice an unusual 
number of spikes/peaks on their horizontal units (particularly E-W from 
Indiana) between the arrival of S and the arrival of LQ? They are on the 
USIN units as well as mine? (namely at 2 min after S, and between 19 and 
39 minutes-- ending about 8 minutes before LQ predicted arrival) ---  
PKP. PP, PPS and even SSS come through well on the vertical ... 
frequency of these mystery waves seems to be between .02 and .1 Hz -- 
another quake????

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