Investigating the Role of Seismic Waves on Multi-fault Rupturing

Hector Gonzalez-Huizar, & Roby Douilly

Published August 15, 2020, SCEC Contribution #10647, 2020 SCEC Annual Meeting Poster #155

This project seeks to assess the effect of dynamic triggering of multi-fault rupture with application to the Cajon Pass area. Dynamic triggering on a fault occurs when the passing of seismic waves alters the mechanical state or properties of the fault, weakening it and advancing its failure. Recent studies have shown that in some cases of multi-fault ruptures the seismic waves generated by the failure in one of the faults plays an important role in triggering the failure of the subsequent faults. Here we presente our preliminary results of a project that aims to evaluate the role of seismic wave-related stress in promoting multi-fault ruptures, specifically, in a potential propagation of a rupture on the San Jacinto Fault (SJF) onto the San Andreas Fault (SAF). This project combines dynamic rupture modeling (using the FaultMod spontaneous rupture code) with dynamic stress modeling (the related to seismic waves) to assess a potential multi-fault rupture scenery across the Cajon Pass area.

Key Words
Multi-fault rupturing, dynamic triggering

Citation
Gonzalez-Huizar, H., & Douilly, R. (2020, 08). Investigating the Role of Seismic Waves on Multi-fault Rupturing. Poster Presentation at 2020 SCEC Annual Meeting.

Related Projects & Working Groups
Fault and Rupture Mechanics (FARM)