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USGS National Seismic Hazard Model Fault Section Database

The U.S. Geological Survey’s National Seismic Hazard Model (NSHM) fault section database is the central repository of geologic data used as inputs for all fault sections included in USGS NSHMs. Consolidation of fault section data from multiple databases and NSHM source codes facilitates: 1) change tracking of all NSHM fault section data, 2) enforcing consistent identification and naming conventions across multiple NSHM updates, 3) more direct access to NSHM data, and 4) participation from the broader earthquake science community. The NSHM fault section database consists of plain text GeoJSON files with associated README documentation files in folders for each fault section grouped by state or territory. The flat file database is stored as a Git repository (https://code.usgs.gov/ghsc/nshmp/nshm-fault-sections). Consistent structural representation of fault sections permits multi-section ruptures in hazard models to be stitched together dynamically by USGS hazard codes, thereby minimizing redundant section data. The initial version of the NSHM fault section database contains the 2008 edition of the Conterminous U.S. (CONUS) NSHM. The version presented here expands on the initial fault section database to include all current NSHM editions (CONUS, Alaska, Hawaii, Guam and the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands, and American Samoa). This new database forms a baseline fault source model for development of future NSHM updates.

Presenting Author: Jason M. Altekruse

Student Presenter: No

Day: 4/21/2021

Time: 11:30 AM - 12:30 PM Pacific

Additional Authors