a guess
Posted by John Vidale on August 20, 2004 at 21:21:03:

maybe all 3 gulf of California events were triggered by an aseismic transient, or perhaps the first event was much larger than indicated by its Ms.

3.6 2004/08/20 09:43:49 29.236 -114.165 10.0 124 km ( 77 mi) NW of Santa Isabel, Mexico
4.6 2004/08/20 08:06:14 28.128 -113.170 10.0 33 km ( 21 mi) SSE of Santa Isabel, Mexico
4.6 2004/08/20 06:33:05 29.902 -114.007 10.0 147 km ( 92 mi) SE of San Felipe, Mexico

John

Follow Ups:
     ● An aseismic transient? - Roger Hunter  06:03:28 - 8/21/2004  (22550)  (1)
        ● Re: An aseismic transient? - Don in Hollister  10:54:43 - 8/21/2004  (22551)  (1)
           ● Oh,THAT aseismic transient. - Roger Hunter  12:21:44 - 8/21/2004  (22552)  (1)
              ● aseismic transient. - John Vidale  12:54:35 - 8/21/2004  (22553)  (1)
                 ● Yes, I figured as much. - Roger Hunter  14:30:30 - 8/21/2004  (22554)  (1)
                    ● No, I'm going on vacation again - John Vidale  23:20:14 - 8/21/2004  (22556)  (1)
                       ● What paper? - chris in suburbia  18:21:46 - 8/22/2004  (22557)  (1)
                          ● a test of syzygy on a global scale - John Vidale  22:15:51 - 8/22/2004  (22564)  (0)