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Surface fault displacement models for strike-slip faults

April 25, 2023

Fault displacement models (FDMs) are an essential component of the probabilistic fault displacement hazard analyses (PFDHA), much like ground motion models in the probabilistic seismic hazard analyses for ground motion hazards. In this study, we develop several principal surface FDMs for strike-slip earthquakes. The model development is based on analyses of the new and comprehensive fault displacement database developed as part of the Fault Displacement Hazard Initiative project led by the University of California, Los Angeles. The main objective of our study is to update the FDMs that were developed over a decade ago by the U.S. Geological Survey and California Geological Survey, in which a reference trace was drawn manually, FDMs are fixed-effect models for lateral displacement, displacement on multiple subparallel ruptures is not aggregated, magnitude (M) scaling is linear, and natural logarithm of displacement is assumed to be normally distributed.

Publication Year 2023
Title Surface fault displacement models for strike-slip faults
DOI 10.34948/N3RG6X
Authors Brian S. J. Chiou, Rui Chen, Kate Thomas, Christopher W. D. Milliner, Timothy E. Dawson, Mark D. Petersen
Publication Type Report
Publication Subtype Organization Series
Series Title Report GIRS
Series Number 2022-07
Index ID 70243157
Record Source USGS Publications Warehouse
USGS Organization Geologic Hazards Science Center