[CIG-SEISMO] instability of forward simulation

[Dimitri Komatitsch]

Dear Arjun,

Thank you for your bug report. This bug has also been noticed by other 
users before the summer. Two of the GLOBE developers (Daniel Peter and 
Joseph Charles; I cc them) are currently investigating it and fixing it.
Hopefully we should be able to release a new version in the middle of 
September. We will then send an email to the CIG mailing list.

Sorry about the problem. It seems someone committed a modification that 
made the package unstable.

(you can thus temporarily revert to an older version (which you can get 
from the SVN server using  "svn checkout -r YYYY", where YYYY is an old 
release number (which you can get using "svn log" and selecting a 
version from a few months ago, or maybe even 2011 or 2010 to be safe).

Thank you,
Dimitri.

On 07/31/2012 01:49 PM, A. Datta wrote:
> Hi,
>
> I have been using SPECFEM3D GLOBE for some forward global simulations but
> my simulations often terminate with the following error message:
>
> "forward simulation became unstable and blew up in the fluid"
>
>> From a glance at the code I know this corresponds to the maximum potential
> in fluid in all slices becoming greater than a threshold value (or
> negative).
>
> Can someone please explain what this means, i.e. when this happens ? Could
> it have anything to do with the meshing ? I use NEX_XI =192 and NPROC_XI =
> 3, so as to engage 54 processors.
>
> Thanks,
> Arjun
>
>

-- 
Dimitri Komatitsch - komatitsch aT lma.cnrs-mrs.fr
CNRS Research Director (DR CNRS), Laboratory of Mechanics and Acoustics,
UPR 7051, Marseille, France    http://komatitsch.free.fr