more ringmap questions
Posted by John Vidale on May 22, 2003 at 08:47:23:

Don,

Motions are weaker past 100 degrees distance than closer. Why would MORE events be triggered in several windows beyond 100 degrees? I understand the antipode focuses, albeit in a frequency-dependent way, but why in the shadow zone?

I would have expected the surface waves are more associated with the peak motions, especially at long periods, and they don't know there is a shadow zone.

John

Follow Ups:
     ● Re: more ringmap questions - Canie  23:00:18 - 5/22/2003  (18776)  (1)
        ● I found a partial answer - John Vidale  07:18:09 - 5/23/2003  (18778)  (1)
           ● John, the rings come from Lowell - Roger Hunter  15:04:36 - 5/23/2003  (18779)  (1)
              ● but what's the logic? - John Vidale  15:28:57 - 5/23/2003  (18780)  (2)
                 ● Re: but what's the logic? - Canie  17:30:57 - 5/23/2003  (18785)  (0)
                 ● Re: but what's the logic? - Roger Hunter  17:29:53 - 5/23/2003  (18784)  (1)
                    ● I'd expect a different pattern - John Vidale  17:51:33 - 5/23/2003  (18786)  (2)
                       ● Re: I'd expect a different pattern - Canie  21:52:51 - 5/23/2003  (18788)  (1)
                          ● Denali distribution of strong motions - John Vidale  22:50:14 - 5/23/2003  (18789)  (0)
                       ● Re: I'd expect a different pattern - Roger Hunter  18:40:47 - 5/23/2003  (18787)  (0)