CRESCENT CFM: Building a Community Fault Model for the Cascadia Subduction Zone
Description:
Earthquakes on faults within the upper (North America) and lower (Juan de Fuca) plates of the Cascadia subduction zone are the least constrained earthquake sources in Cascadia. Many of these faults are located beneath or near population centers and have the potential for significant seismic and cascading hazards. A community fault model (CFM) for the Cascadia region will enable group evaluation of these earthquake sources. The Cascadia Region Earthquake Science Center (CRESCENT) CFM working group is developing a comprehensive topological and activity model of active faults in the upper plate of the Cascadia subduction zone. The topological model combines both on and off-shore fault systems, and models of the plate interface. An initial simplified CFM has been built based on the USGS National Seismic Hazard Model 2023 fault sections database. Off-shore wedge faults and upper plate faults constrained by new data are being reviewed and prioritized for incorporation into the CFM. By providing well-constrained fault geometries and geologic slip rates, the CFM can benefit several use-cases, including seismic hazard analyses, stress modeling and multi-cycle rupture modeling, providing boundaries and constraints in the CRESCENT Community Velocity Model, and potentially in probabilistic tsunami hazard analyses. We seek feedback from the community to continue to improve the inventory and representation of active faults in the CRESCENT CFM.
Session: Compiling Active Faults for Improved Hazard Modeling from Cascadia to Alaska - I
Type: Oral
Date: 4/17/2025
Presentation Time: 05:15 PM (local time)
Presenting Author: Rebecca
Student Presenter: No
Invited Presentation:
Poster Number:
Authors
Rebecca Fildes Presenting Author Corresponding Author fildesr@wwu.edu Western Washington University |
Ashley Streig streig@pdx.edu Portland State University |
Colin Amos amosc2@wwu.edu Western Washington University |
Scott Bennett sekbennett@usgs.gov U.S. Geological Survey |
Alexandra Hatem ahatem@usgs.gov U.S. Geological Survey |
Andrew Meigs andrew.meigs@oregonstate.edu Oregon State University |
Emily Roland rolande2@wwu.edu Western Washington University |
Richard Styron richard.styron@globalquakemodel.org Global Earthquake Model Foundation |
Harold Tobin htobin@uw.edu University of Washington |
Anna Ledeczi ledeczi@uw.edu University of Washington, Seattle, Washington, United States |
Madeleine Lucas mlucas12@uw.edu University of Washington, Seattle, Washington, United States |
CRESCENT CFM: Building a Community Fault Model for the Cascadia Subduction Zone
Category
Compiling Active Faults for Improved Hazard Modeling from Cascadia to Alaska