DSM (Direct Solution Method) software

Upgraded software for computing synthetic seismograms for spherically symmetric Earth models is available. Software both for a single processor and for multiple processors (using MPI) is prepared.

• Higher frequency computations (e.g. up to 2 Hz) for TI media
• Rigorous computations without using any approximations other than numerical discretization
• 3-component seismograms in a single job (no necessity for separate computations for P-SV and SH components)
• Outputs in the SAC binary format

download (for multiple processors; dsmti-2.2.10.tar)
download (for a single processor; dsmti-3.1.8.tar)

<Example Synthetic Seismograms>

• Sharp P onset in 2 Hz synthetic seismograms
• PKiKP synthetic seismograms

<References>

• Kawai, K., Takeuchi, N. & Geller, R.J., 2006. Complete synthetic seismograms up to 2 Hz for transversely isotropic spherically symmetric media, Geophys. J. Int., 164, 411-424.
  
• Takeuchi, N., Geller, R.J. & Cummins, P.R., 1996.  Highly accurate P-SV complete synthetic seismograms using modified DSM operators, Geophys. Res. Lett., 23, 1175-1178.
• Cummins, P.R., Geller, R.J., Hatori, T. & Takeuchi, N., 1994.  DSM complete synthetic seismograms: SH, spherically symmetric, case, Geophys. Res. Lett., 21, 533-536.