PSN-L Email List Message

Subject: Re: Large earthquake near cost of Canada
From: "Thomas Dick" dickthomas01@.............
Date: Sun, 6 Jan 2008 21:45:31 -0600

> Not really.  At my station the P-wave amplitude was about 1.5 micrometers 
> zero to peak.  Based on this, I computed an mb of 7.0, using AmaSeis' 
> built-in magnitude calculations:
> I added an image showing the calculation window to this page:
> (You may have to refresh your browser to see the new image at the bottom.)
Thanks for taking the time for me. I didn't know. Because of the shallowness 
of the focus and the closeness of your recording site, I "expected" P and S 
to have a more similar amplitude.....I am not taking about my did surprise me that the Lehmans at my location seemed to 
be noisey in the P to PcS arrival time frame. And since I am taking up your 
time, another question, does the AS-1 show any directional 
sensitivity....maybe as the result of improper setup? 

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