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Openquake 0.3 hazard modeler's toolkit

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bwyss edited this page Mar 16, 2011 · 2 revisions

##PSHA Hazard Modeler's Toolkit

Introduction

The Modeler's Toolkit is the second fundamental component developed by GEM together with the hazard modelling community. This toolkit is intended to become a fundamental instrument for the creation of PSHA input models. These models will be one of the inputs to the OpenQuake Hazard engine. The output from the Modeler's Toolkit is the PSHA Input Model, which contains two components: 1) the _Seismic Source System _describes the full composition of the seismic source model, which includes the corresponding attributes for each source and the respective weighting in the Logic Tree ; 2) the GMPE System identifies the GMPEs intended for use in the hazard analysis and their respective weights in the Logic Tree.

Notes

Assumptions

  • There is a pre-calculating tool (Fault Source Generator Tool) that transforms active fault observation data into fault sources with the expected 10 required attributes & those data are in NRML format
  • The user may have source models or GMPEs that are properly formated to be used in the Modeler's Toolkit
  • Earthquake catalog (instrumental and historical seismicity catalogues) data are in NRML format
  • Fault database (seismogenic sources) are in NRML format
  • Strain Table data are in NRML format
  • There is a well defined/documented list of algorithms, a well organized set of python scripts to process these algorithms, and user friendly documentation to allow members of the community to contribute algorithms to the tool.
  • The Source Model (expected output of the Modeler's toolkit) is in NRML format, it can be passed to the Hazard Engine, and it can be used as input to the Modeler's Toolkit in an iterative process

Design

The tool should allow the user to visualize data from:

  • Earthquake catalog data
  • Active faults (processed into fault sources)
  • Strain Tables
  • Source Models/GMPE (from database or upload into the system)

The tool is also intended to provide the user with some basic GIS tools such as:

  • Select by location
  • Select by attribute
  • Snap end polyline points
  • Some basic thematic mapping
  • Edit Source Models/GMPE attributes and geometry
  • Logic tree visualization/editing

With the above capabilities the user should be able to make a selection of a region containing earthquake activity (from the earthquake catalog) and fault sources (observations), and pass that selection to be computed against a list of pre-coded algorithms that will generate (in a logic-tree format) PSHA input models. Our intention is to initially incorporate basic functionalities and progressively extend them. An initial version of the toolkit is planned to be included in version 0.3 of OpenQuake.

work-flow for GEM's Hazard Modeler's Toolkit:

User Stories

  • Develop a schema for the required input data (earthquake catalog, fault sources, strain table) in NRML format
  • Parse the NRML data
  • Develop computation algorithms
  • Initiate an instance of GeoNode
  • Develop a UI interface to view primary data & Source Models/GMPEs
  • Develop a UI interface that allows for thematic mapping
  • Develop a UI interface that allows for attribute editing (of Source Models/GMPEs)
  • Develop a UI interface that allows for visualization of logic trees
  • Develop a UI interface that allows for editing of logic trees
  • Develop a UI interface that allows for interaction with algorithm calculator
  • Develop a UI interface that allows for the comparison of multiple ource Models/GMPEs (side by side)

Suggested Implementation

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