33. Seismic risk related programs
This section is written by M. B. Sørensen, based on a previous version by K. Atakan.
Extensive testing of the programs was done over the years by many users.
Currently, the SEISAN package includes a series of stand-alone programs and Seisan Explorer (SE) functions that can be used in a number of tasks that are needed to perform seismic hazard analysis. The basic requirements for performing a probabilistic seismic hazard analysis (PSHA) may be summarized as follows:
- Collect the best possible earthquake catalog for the study area.
- Homogenize the earthquake catalogue and assess the completeness.
- Define the seismic source zones.
- Prepare input parameters from the earthquake catalogue for each source zone.
- Define ground motion prediction equations (GMPE) for the region.
- Compute hazard in terms of different ground motion parameters (e.g., peak ground acceleration (PGA), peak ground velocity (PGV) or spectral acceleration (SA) at different periods).
- Assess site effects.
- Prepare response spectra.
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