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.

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.

Research Funding:

Princeton University, NSF, HP2C Petaquake, QUEST ITN (Marie Curie), ETH Zurich, Oxford University.

1. seismology