PSN-L Email List Message
Subject: Re: Surface waves from Sumatra M 9.0, 2nd Version
From: Mark Robinson mark.robinson@...............
Date: Fri, 07 Jan 2005 11:15:10 +1300
John Hernlund wrote:
> Thanks for pointing this out.
> Hint for answer: Earth is spherical, not circular...
> On Thursday, January 6, 2005, at 11:10 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 (with the now correct URL!):
>> 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?
If you have access to a room with a dome, go there with a friend, take up
positions on opposite sides, and whisper.
07 Jan 1924 George Gershwin composes Rhapsody in Blue.
07 Jan 1952 Ike offers to accept GOP Presidential Nomination.
Public Seismic Network Mailing List (PSN-L)
[ Top ]
[ Back ]
[ Home Page ]