Combining dynamic rupture simulations with ground motion data to characterize seismic hazard from Mw 3-5.8 earthquakes in Oklahoma and Kansas

Bulletin of the Seismological Society of America
By: , and 

Links

Abstract

Many seismically active areas suffer from a lack of near‐source ground‐motion recordings, making ground‐motion prediction difficult at distances within 40  km∼40  km from an earthquake. We aim to aid the development of near‐source ground‐motion prediction equations (GMPEs) by generating synthetic ground‐motion data via simulation. Building on previous work using point‐source moment tensor sources to simulate small (MwMw 3–4) earthquakes for a target region encompassing north central Oklahoma and south central Kansas, we perform dynamic rupture simulations of earthquakes up to MwMw 5.8. We introduce complexity into the rupture process by adding stochastically generated heterogeneity to initial stress conditions. Our simulated ground‐motion data are added to a catalog of recorded ground‐motion data to construct a composite recorded‐simulated ground‐motion catalog that we use to develop a GMPE for the target region. This procedure can be generalized and used for GMPE development in other regions with near‐source ground‐motion data scarcity, which could directly benefit critical applications such as the National Seismic Hazard Maps produced by the U.S. Geological Survey (USGS).

Study Area

Publication type Article
Publication Subtype Journal Article
Title Combining dynamic rupture simulations with ground motion data to characterize seismic hazard from Mw 3-5.8 earthquakes in Oklahoma and Kansas
Series title Bulletin of the Seismological Society of America
DOI 10.1785/0120180042
Volume 109
Issue 2
Year Published 2019
Language English
Publisher Seismological Society of America
Contributing office(s) Geologic Hazards Science Center
Description 20 p.
First page 652
Last page 671
Country United States
State Kansas, Oklahoma
Google Analytics Metrics Metrics page
Additional publication details