portada Seisrisk II, a Computer Program for Seismic Hazard Estimation: Usgs Open-File Report 82-293 (en Inglés)

Seisrisk II, a Computer Program for Seismic Hazard Estimation: Usgs Open-File Report 82-293 (en Inglés)

Formato

Libro Físico

Autor

Bernice Bender

D. M. Perkins

Editorial

Bibliogov

Idioma

Inglés

N° páginas

108

Encuadernación

Tapa Blanda

Dimensiones

24.6x18.9x0.6 cm

Peso

0.21 kg.

ISBN13

9781288868193

Categorías

Política y gobierno

Seisrisk II, a Computer Program for Seismic Hazard Estimation: Usgs Open-File Report 82-293 (en Inglés)

Bernice Bender (Autor) · D. M. Perkins (Autor) · Bibliogov · Tapa Blanda

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Reseña del libro "Seisrisk II, a Computer Program for Seismic Hazard Estimation: Usgs Open-File Report 82-293 (en Inglés)"

The computer program SEISRISK II calculates probabilistic ground motion values for use in seismic hazard mapping. SEISRISK II employs a model that allows earthquakes to occur as points within source zones and as finite-length ruptures along faults. It assumes that earthquake occurrences have a Poisson distribution, that occurrence rates remain constant during the time period considered, that ground motion resulting from an earthquake is a known function of magnitude and distance, that seismically homogeneous source zones are defined, that fault locations are known, that fault rupture lengths depend on magnitude, and that earthquake rates as a function of magnitude are specified for each source. SEISRISK II calculates for each site on a grid of sites the level of ground motion that has a specified probability of being exceeded during a given time period. The program was designed to process a large (essentially unlimited) number of sites and sources efficiently and has been used to produce regional and national maps of seismic hazard.}t is a substantial revision of an earlier program SEISRISK I, which has never been documented. SEISRISK II runs considerably [aster and gives more accurate results than the earlier program and in addition includes rupture length and acceleration variability which were not contained in the original version. We describe the model and how it is implemented in the computer program and provide a flowchart and listing of the code.