SPECFEM3D

SPECFEM3D version 2.0, named "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. 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.

Latest Release

SPECFEM3D_V2.0.1.tar.gz [8 april 2011]

Version 2.0.1 "Sesame" includes bug fixes and optimized file I/O for adjoint and noise simulations.

The MD5 checksum of this file (computed for instance using the Linux 'md5sum' command) is ea77f3ad780f88135897aed7ccf8afb8.

Development Version

If you are interested in following the main line of development, use the following Subversion command:

svn checkout http://geodynamics.org/svn/cig/seismo/3D/SPECFEM3D/trunk SPECFEM3D

Documentation

SPECFEM3D User Manual

A PDF containing SPECFEM3D's installation and running instructions.

SPECFEM3D Tutorials

Step-by-step tutorials how to run SPECFEM3D simulations.

SPECFEM3D Users Map

Shows location of users who downloaded SPECFEM3D since the code was released (image updated daily).

Help

To identify known issues, report bugs, request help, or provide feedback or suggestions:

• Browse and/or submit new issues at our RoundUp Bug Tracker.
• Browse the CIG Computational Seismology Mailing List Archive.
• E-mail the CIG Computational Seismology Mailing List with details of your problem or suggestion.