AXISEM

Enlarged view: seis kernel
Seismogram and corresponding snapshot of waveform kernel (courtesy Tarje Nissen-Meyer)

AXISEM is a parallel spectral-element method to solve 3D global acousto-elastic wave
propagation. The background model is spherically symmetric (e.g., PREM, IASP91) and meshed automatically for a given dominant seismic period. This allows the computational domain to be collapsed to 2D while the third azimuthal dimension is solved analytically. This 1D-model, 2D-domain, 3D-waves approach leads to unprecedented resolutions for global wave propagation (e.g. up to 1Hz) on moderate computer clusters or workstations. The Fortran90/MPI code is used by a number of international groups.

Contact

Tarje Nissen-Meyer

References

Nissen-Meyer, T., Fournier, A., Dahlen, F. A., 2007. A 2-D spectral-element method for computing spherical-earth seismograms--I. Moment-tensor source,
Geophys. J. Int., Vol. 168, issue 3, pp. 1067-1093.

Nissen-Meyer,T., Fournier, A., Dahlen, F. A., 2008. A 2-D spectral-element method for computing spherical-earth seismograms--II. Waves in solid-fluid media,
Geophys. J. Int., Vol. 174, issue 3, pp. 873-888.

Nissen-Meyer, T., 2007. Full-wave seismic sensitivity in a spherical earth,
Ph.D. dissertation, Princeton University, Princeton, NJ.

JavaScript has been disabled in your browser