An Overview of the Fault Displacement Hazard Initiative Research Program
Session: Fault Displacement Hazard: New Data and Modeling Advances I
Type: Oral
Date: 4/22/2021
Presentation Time: 09:45 AM Pacific
Description:
The Fault Displacement Hazard Initiative (FDHI) program was launched in 2018 to develop a modern fault rupture and displacement database, next-generation fault displacement models, and engineering guidelines for fault displacement analysis. Quantifying fault rupture hazard is necessary for the seismic design of infrastructure that cannot mitigate the hazard by avoidance, and modern design criteria can require both deterministic and probabilistic displacement analyses. The current models are ergodic and constrained by datasets typically dating to the early 2000s. These datasets are limited in that they contain irregularly-spaced slip measurements for the primary/principal rupture, sparse data on secondary/distributed faults or shears, and incomplete reporting on measurement uncertainties and geologic structure. Consequently, existing fault displacement models are based on relatively few historical earthquakes with incomplete, uneven, or biased measurement sampling, resulting in large uncertainties that impact both deterministic and probabilistic hazard. For the FDHI program, we are developing a comprehensive global database of geospatially-controlled historical surface-rupturing earthquake displacement measurements and rupture maps. The database currently contains 66 events of all styles of faulting, ranging from M 5.0 to 8.0. Five modeling teams are participating in the FDHI program to develop new fault displacement models for principal displacement, distributed displacement, and/or “total” wide-aperture displacement (i.e., discrete slip and continuous inelastic deformation), and one dynamic rupture simulations team is modeling total displacement and fault zone width with distributed displacement. The teams are using the FDHI database, which was developed in collaboration with the modelers. Trial hazard analyses using the displacement models will be performed at representative sites to support guidelines and recommendations for use in engineering applications.
Presenting Author: Yousef Bozorgnia
Student Presenter: No
Authors
Yousef Bozorgnia Presenting Author Corresponding Author yousef.bozorgnia@ucla.edu University of California, Los Angeles |
Norman Abrahamson abrahamson@berkeley.edu University of California, Berkeley, SC Solutions |
Maria Arcos beth.arcos@woodplc.com John Wood Group, PLC |
Stéphane Baize stephane.baize@irsn.fr Institut de Radioprotection et de Sûreté Nucléaire |
Paolo Boncio paolo.boncio@unich.it Università G. d'Annunzio di Chieti-Pescara |
Shu-Hsien Chao shchao@narlabs.org.tw National Center for Research on Earthquake Engineering |
Rui Chen rui.chen@conservation.ca.gov California Geological Survey |
Brian Chiou brian.chiou@dot.ca.gov Caltrans |
Timothy Dawson timothy.dawson@conservation.ca.gov California Geological Survey |
Jennifer Donahue jennifer@jldengineering.com University of California, Los Angeles, JL Donahue Engineering, Inc., Bend, Oregon, United States |
Christine A Goulet cgoulet@usc.edu Southern California Earthquake Center, Los Angeles, California, United States |
Kathryn L Hanson kathryn@klhansonconsult.com KL Hanson Consulting, Ely, Minnesota, United States |
Albert Kottke arkk@pge.com Pacific Gas and Electric Company, San Francisco, California, United States |
Nicolas Kuehn kuehn@ucla.edu University of California, Los Angeles, Los Angeles, California, United States |
Chun-Hsiang Kuo chkuo@ncu.edu.tw National Central University, Taoyuan City, , Taiwan (Greater China) |
Grigorios Lavrentiadis glavrent@berkeley.edu University of California, Berkeley, Berkeley, California, United States |
Danielle Madugo madugo@g.ucla.edu University of California, Los Angeles, Los Angeles, California, United States |
Silvia Mazzoni smazzoni@ucla.edu University of California, Los Angeles, Los Angeles, California, United States |
Christopher W D Milliner milliner@caltech.edu Caltech, Pasadena, California, United States |
Robb E S Moss rmoss@calpoly.edu California Polytechnic State University, San Luis Obispo, California, United States |
Fiia Nurminen fiia.nurminen@unich.it Università G. d'Annunzio di Chieti-Pescara, Chieti, , Italy |
Bruno Pace bruno.pace@unich.it Università G. d'Annunzio di Chieti-Pescara, Chieti, , Italy |
Mark D Petersen mpetersen@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Alexandra Sarmiento sarmiento.alexandrac@gmail.com University of California, Los Angeles, GeoPentech, Inc., Los Angeles, California, United States |
Andi Shen adshen1993@gmail.com University of California, Los Angeles, Tongji University, Shanghai, , China (Mainland) |
Kate Thomas kate.thomas@conservation.ca.gov California Geological Survey, Sacramento, California, United States |
Stephen C Thompson thompson@lettisci.com Lettis Consultants International, Inc., Concord, California, United States |
Francesco Visini francesco.visini@ingv.it Istituto Nazionale di Geofisica e Vulcanologia, L’Aquila, , Italy |
Yongfei Wang yongfeiw@usc.edu Southern California Earthquake Center, Los Angeles, California, United States |
Robert Youngs bob.youngs@woodplc.com John Wood Group, PLC, Oakland, California, United States |
An Overview of the Fault Displacement Hazard Initiative Research Program
Category
Fault Displacement Hazard: New Data and Modeling Advances