Welcome to 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 here under the GPL license.
Major code developers are Martin van Driel, Simon Stähler, Tarje Nissen-Meyer, Stefanie Hempel, and Alexandre Fournier, primarily at Oxford University, ETH Zurich, Princeton University, IPG Paris, LMU Munich, and Universität Münster.
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.
Instaseis: Instaseis is a new methodology building upon AxiSEM: Storing wavefield databases with a fast extraction algorithm, one can obtain arbitrary seismograms within milliseconds. See the Instaseis website and a new corresponding paper for more information.