Seismic source characterization for the 2014 update of the U.S. National Seismic Hazard Model

Earthquake Spectra
By: , and 

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Abstract

We present the updated seismic source characterization (SSC) for the 2014 update of the National Seismic Hazard Model (NSHM) for the conterminous United States. Construction of the seismic source models employs the methodology that was developed for the 1996 NSHM but includes new and updated data, data types, source models, and source parameters that reflect the current state of knowledge of earthquake occurrence and state of practice for seismic hazard analyses. We review the SSC parameterization and describe the methods used to estimate earthquake rates, magnitudes, locations, and geometries for all seismic source models, with an emphasis on new source model components. We highlight the effects that two new model components—incorporation of slip rates from combined geodetic-geologic inversions and the incorporation of adaptively smoothed seismicity models—have on probabilistic ground motions, because these sources span multiple regions of the conterminous United States and provide important additional epistemic uncertainty for the 2014 NSHM.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Seismic source characterization for the 2014 update of the U.S. National Seismic Hazard Model
Series title Earthquake Spectra
DOI 10.1193/110514EQS183M
Volume 31
Issue S1
Year Published 2015
Language English
Publisher EERI
Contributing office(s) Geologic Hazards Science Center
Description 27 p.
First page S31
Last page S57