Improved implementation of rupture location uncertainty in fault displacement hazard assessment

Bulletin of the Seismological Society of America
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Abstract

This short note proposes an improvement to the implementation of uncertainty associated with rupture location from future earthquakes in probabilistic fault displacement hazard analysis. Location uncertainty leads to nonzero primary fault displacement near a mapped fault. With the improved implementation of location uncertainty, estimated fault displacement hazard at a given site is affected strongly by the dimension of the area considered (or the footprint size of the structure). A larger area near a mapped fault has greater potential of exhibiting primary fault displacement than does a smaller area at the same location. In addition, fault displacement hazard is affected by fault‐map quality and fault‐trace complexity. For a more accurately mapped fault with simpler geometry, larger fault displacement is expected directly over and in close proximity of the mapped fault. If fault location is highly uncertain and fault traces are complex, expected displacement is spread out in a wider zone along the mapped fault.

Publication type Article
Publication Subtype Journal Article
Title Improved implementation of rupture location uncertainty in fault displacement hazard assessment
Series title Bulletin of the Seismological Society of America
DOI 10.1785/0120180305
Volume 109
Issue 5
Year Published 2019
Language English
Publisher Seismological Society of America
Contributing office(s) Geologic Hazards Science Center
Description 6 p.
First page 2132
Last page 2137
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