Jon,

The focal mech for this quake is primarily an extensional motion with a bit=
 of
oblique motion rather than subduction
see  my page here for an intro to focal mec diagrams and how they relate to
faulting      http://www.sydneystormcity.com/fomec.htm
in Diag  D  you will see Fomec's relating to subduction and thrusting

  That being said  once upon a time, long, long ago, the western end of the
Mediterranian was subduction.  most of that now is in the central "Med" Sea
area which continues to fuel Mt Etna and push the Swiss Apls a little=
 higher.

Cheers
Dave N
Sydney



At 05:20 AM 4/12/2010 +0000, you wrote:
>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,
>--
>J=F3n Fr=EDmann J=F3nsson
>
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