Skip to content

OpenQuake Hazard PSHA Input Model

Jump to bottom
mmpagani edited this page Nov 15, 2010 · 10 revisions

PSHA Input Model

Introduction

First step in the calculation of probabilistic seismic hazard is the creation of an Earthquake Rupture Forecast (ERF) i.e. a list of all the possible ruptures - with an associated probability of occurrence in a given time span - occurring on all the seismic sources considered in a given analysis.

OpenQuake creates the ERF using information contained in one input file and formatted according to a unified PSHA input data model (defined in the course of GEM1 - the GEM kick-off project http://www.globalquakemodel.org/gem1) currently supporting four types of seismic sources. In particular, for each source type, a set of parameters specifies the data necessary to create a Seismic Source instance and successively calculate the comprehensive set of ruptures with their probability of occurrence.

The Seismic Sources currently supported by OpenQuake (version 0.1) are:

  • Area sources
  • Grid sources
  • Fault sources based on a
    • Simple geometry
    • Complex geometry

Assumptions

  • OpenQuake 0.1 - The seismicity temporal occurrence model follows a Poisson process

### Suggested Implementation

  • OpenQuake 0.3 - Extend the Unified PSHA Input Data model so as to support additional source typologies and generalize the use of different seismicity temporal occurrence models

Back to Blue Prints

Clone this wiki locally