daniel peter dpeter at Princeton.EDU
Mon Nov 29 17:02:32 PST 2010

We are pleased to announce the release of version 2.0.0, named  
"Sesame", of SPECFEM3D:

SPECFEM3D "Sesame" uses the continuous Galerkin spectral-element  
method, which can be seen as a particular case of the discontinuous  
Galerkin technique with optimized efficiency owing to its tensorized  
basis functions, to simulate forward and adjoint coupled acoustic- 
(an)elastic seismic wave propagation on arbitrary unstructured  
hexahedral meshes.

This major new release benefits from advances in hexahedral meshing,  
load balancing and code optimizations. We strongly encourage users to  
switch to this new version, which has far greater flexibility than  
previous versions:


The main changes in version 2.0.0 are:

-  Meshing may be accomplished using a mesh generation tool kit such  
as CUBIT, GiD or Gmsh, and load balancing is facilitated by graph  
partitioning based on the SCOTCH library,  which is included in the  
package. The previous internal layer cake mesher has been extended to  
allow greater flexibility and also continues to be available.
- Topography, bathymetry and Moho undulations are readily included in  
a mesh, and physical dispersion and attenuation associated with  
anelasticity are accounted for using a series of standard linear solids.
- Coupling between fluid and solid regions is accommodated using  
domain decomposition, thereby facilitating off-shore simulations.
- Finite-frequency Fréchet derivatives for earthquake and seismic  
interferometric data are calculated based on adjoint methods in both  
fluid and solid domains, thereby facilitating "adjoint tomography"  
with earthquakes and seismic noise.

Please e-mail your feedback, questions, comments, suggestions, and bug  
reports to the CIG Computational Seismology mailing list (cig-seismo  
at geodynamics.org).

Daniel Peter, Dimitri Komatitsch, Jeroen Tromp
November 29, 2010.

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