Re: pinhole Surface waves from Sumatra M 9.0

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From: Deb Hunt (dhunt@exploratorium.edu)
Date: Thu Jan 06 2005 - 08:55:12 PST 

Message-Id: <BB02B488-6003-11D9-87F1-0030656B1132@exploratorium.edu>
From: Deb Hunt <dhunt@exploratorium.edu>
Subject: Re: pinhole Surface waves from Sumatra M 9.0
Date: Thu, 6 Jan 2005 08:55:12 -0800

Dear John and Jan,
Looks like the file location is on your local hard drive.
Can you give a url we can all access?
Thanks,
Deb

On Jan 6, 2005, at 6:41 AM, John or Jan Lahr wrote:

If you haven't taken a look at the IRIS "Image of the Week" yet,
check out this page:
file:///C:/education/Sumatra%209.0/surface_waves.htm

The image shows seismic records from stations distributed around
the globe and surface waves that traveled twice around!

Questions to think about -- Why does the y-axis stop at 180 degrees?
Why would the amplitude of the surface waves fall off around 90 degrees
and then increase at 180 degrees again?

Cheers,
John

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