I have not looked at this event but you might look to see if it occurred =
on
a side flat that is dipping under the slip fault. This could be part of =
the
normal faulting and folding that takes place as the plates slip past =
each
other. Take a look at the Loma Prieta Oct 17,1986 event and you will see =
an
example of this. The main event was along the side Zayante Fault next to =
the
San Andreas and in this area tectonics has subducted the Farallon Plate
below and between the Pacific plate and the North American plate. The
subducted plate has contributed to the uplift in the Santa Cruz mountain
range near the north end of the Monterey Bay.

Regards, Steve Hammond PSN San Jose and San Santa Cruz, Aptos, =
California


-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... =
On
Behalf Of J=F3n Fr=EDmann
Sent: Sunday, April 11, 2010 10:21 PM
To: PSN-Postlist
Subject: Spain earthquake

Hi all,

Does anyone know why and how there was a subduction zone earthquake in a
slip fault zone area. I do not get my head around it. My only idea so
far is that there must be a good sized plate down there for some odd
reason.

Regards,
--=20
J=F3n Fr=EDmann J=F3nsson

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