Status:
Actively adding features to support improved science or performance by community contributors.

How to Cite

Code changes:

License:
GNU Public License

AxiSEM

AxiSEM is a parallel spectral-element method for 3D (an-)elastic, anisotropic and acoustic wave propagation in spherical domains. It requires axisymmetric background models and runs within a 2D computational domain, thereby reaching all desired highest observable frequencies (up to 2Hz) in global seismology. The Fortran2003 (OpenMP, MPI) code scales very well on supercomputers and is available under the GPL license. For more details see the website at www.axisem.info.

Please see our corresponding paper "AxiSEM: broadband 3-D seismic wavefields in axisymmetric media" published in Solid Earth, 5, 425-445, doi:10.5194/se-5-425-2014, 2014. Please cite this paper (and others) when using AxiSEM.

Current Release

Source Packages

AXISEM_v1.3.tar.gz [2016-04-11]

Mainly a bugfix release

New features:

New Python-based field_transform.py routine, which allows resuming of field transforms (which can take days for very large databases).
New wavefield file format: "Surface" group is removed, since its variables were not used at all by Instaseis or MCKernel.
Input file templates have correct values for Instaseis/MCKernel usage.
Mainly bugfixes.

Bugfixes:

Correct Q (80 instead of 143) in the lithosphere of internal PREM model.
Correction to the ak135f velocity structure below the 660.
Write velocity models for MINEOS correctly.
Write 2nd order discontinuities correctly into velocity model file.
Fixes in Dipole stiffness terms.

View Prior Source Releases

[show]

AXISEM_v1.1.tar.gz [2014-08-27]

First bugfix release of AxiSEM.

Changes to last version:

Format of external (1D) models is changed and simplified
Power-law Q in attenuation
Full-field output for kernel wavefields and rdbm
Better checking of user input
Cleaning up output

Bugfixes

Serial mode now functional and compiling without MPI
Bugfixes in NetCDF output of (kerner-related) wavefields
Bugfix of all nodes writing into the same file, receiver.dat
Bugfix in writing out 1D model files
Bugfix in mesh decomposition for fluid spheres
Fixed SOLVER/submit.csh script for arbitrary DATA directories, especially for 'single' simulations

AXISEM_v1.0.tar.gz [2013-12-20]

The first release of AxiSEM v1.0.

User Resources

User Manual

The AxiSEM user manual is available online.

Community Wiki

Visit the AxiSEM Wiki page for additional support with building, using, or modifying AxiSEM.

AxiSEM Publications List

Research publications using AxiSEM.

Community Discussion

Browse the CIG Mailing List Archive to find past discussions and previous troubleshooting help, or post to the CIG forum with questions or comments.

Developer Resources

Development Version

If you are interested in getting the development version of this code from the CIG repository, use the following git command:

git clone --recursive https://github.com/geodynamics/axisem.git

You can also browse the history of modifications in the Git repository.

Issue/Bug Tracker on Github

Browse and/or submit new issues at our Github Issues Tracker.

Doxygen Documentation

Auto-generated Doxygen documentation is available for the Development and Release codebases.

AxiSEM Users Map

Shows location of all users who downloaded AxiSEM in the past year (image updated daily.)

map showing location of all users who downloaded AxiSEM in the last year (image updated daily)

This image was generated using GMT: The Generic Mapping Tools which is released under the GNU LGPL3+. Location data is based on MaxMind's GeoLite database which is released under the Creative Commons CC-BY-SA 3.0.