A Next-Generation Fault Displacement and Surface Rupture Database
Session: Fault Displacement Hazard: New Data and Modeling Advances I
Type: Oral
Date: 4/22/2021
Presentation Time: 10:00 AM Pacific
Description:
The Fault Displacement Hazard Initiative (FDHI) database is a new relational database containing data bearing on ruptures and displacements from historical surface-rupturing earthquakes. The database is being used to develop next-generation fault displacement models for probabilistic fault displacement hazard analysis (PFDHA) through the FDHI program. Currently, the database contains rupture and displacement data for 66 historical earthquakes occurring between 1872 and 2019, ranging from M 5.0 to 8.0. The relational database format uses a defined schema to hold different data types in individual tables and relate the data between tables using key fields. This structure improves efficiency, quality control, and expandability, relative to conventional data repository formats which are typically collections of spreadsheets with limited or no cross-referencing. All data are geospatially-controlled with latitude and longitude coordinates. Additionally, all data are also represented in an event-specific coordinate system in which data are transformed to an along-strike dimension in units of meters. Strike, dip, rake, and slip azimuth measurements are included when available. Displacement measurements from new remote sensing techniques, such as optical image correlation, are also included. Typical metadata consists of data sources, dataset originator identifiers and notes, and site geology. Following the conventions in existing fault displacement models, the database also includes interpreted metadata that classify ruptures and measurements as principal or distributed. Finally, for a subset of earthquakes in the database, mapped ruptures prior to the most recent earthquake are included to develop new models correlating mapped faults and observed ruptures. A robust quality assurance and quality control effort has grown through interactions between the database team, modeling teams, and dataset originators, resulting in a high-quality final product.
Presenting Author: Alexandra Sarmiento
Student Presenter: No
Authors
Alexandra Sarmiento Presenting Author Corresponding Author sarmiento.alexandrac@gmail.com University of California, Los Angeles and GeoPentech, Inc. |
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 |
Yousef Bozorgnia yousef.bozorgnia@ucla.edu University of California, Los Angeles |
Timothy Dawson timothy.dawson@conservation.ca.gov California Geological Survey |
Grigorios Lavrentiadis glavrent@berkeley.edu University of California, Berkeley |
Danielle Madugo madugo@g.ucla.edu University of California, Los Angeles |
Fiia Nurminen fiia.nurminen@unich.it Università G. d'Annunzio di Chieti-Pescara |
Andi Shen adshen1993@gmail.com University of California, Los Angeles and Tongji University |
Stephen C Thompson thompson@lettisci.com Lettis Consultants International, Inc., Concord, California, United States |
A Next-Generation Fault Displacement and Surface Rupture Database
Category
Fault Displacement Hazard: New Data and Modeling Advances