[CIG-SEISMO] How to determine moment tensor in SPECFEM2D

[Carl Tape]

Dear Xin,

I have not used SPECFEM2D in quite awhile, but my recollection is that the
moment tensor is 2D, so 2 x 2. I'm not aware of any tool in the code to
reduce a 3D moment tensor into a 2D version, or even whether this has been
done in any other 2D codes.

Carl

---------------------------------------------------------------
Carl Tape
Assistant Professor
Geophysical Institute
University of Alaska Fairbanks
Phone: 907-474-5456
Email: carltape at gi.alaska.edu
Web: http://www.giseis.alaska.edu/input/carl/
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On Mon, Feb 3, 2014 at 2:51 PM, 汪昕 <peterxin8023sara at gmail.com> wrote:

>
> Hi, i want set moment tensor as source type, but i want to know the way
> how to determine these three components, Mxx, Mzz, and Mxz?  For example, i
> assume the fault source is dip45/strike0/slip45 and the moment magnitude is
> Mw=3.0, then calculate the seismic moment M0 (about 3.5E13 N.M). Can i use
> the equation to calculate the 9 components and set these value in 2D
> modeling? if not, what should be the right way in SPECFEM2D.
>
> Thanks a lot!
>
> --
> Cheers,
> Xin
>
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>
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