Simulations of Localization and Coalescence Process Before Large Failure Events
Session: Numerical Modeling of Earthquake Motion, Rupture Dynamics, Seismic Noise, Wave Propagation and Inverse Problems [Poster]
Type: Poster
Date: 4/23/2021
Presentation Time: 03:45 PM Pacific
Description:
Laboratory rock fracturing experiments indicate that large system-size failures are preceded by the generation of distributed cracks and progressive coalescence of individual fractures to large failure zones (e.g., Lockner et al. 1991; Paterson & Wong 2005; Renard et al. 2019; Aben et al 2019). A recent analysis of seismicity provided techniques for quantifying localization in the spatial distribution of seismicity as a function of time, and found evidence for progressive localization before large earthquakes (Ben-Zion & Zaliapin, 2020). To further understand the process of localization of deformation in heterogeneous media, we use three-dimensional discrete element method simulations with the ESyS-Particle code (Abe et al., 2003). The main goals are to investigate how fault strength, roughness, and geometry control the process of localization, and how large events occur on faults without clear surface traces (e.g., the 1992 Landers and 2019 Ridgecrest, CA, earthquakes). A potency magnitude catalog is calculated from all the broken bonds in the simulation using Ben-Zion and Lyakhovsky (2019). Results on the localization process will be presented in the meeting.
Presenting Author: Bruce Zhou
Student Presenter: Yes
Authors
Bruce Zhou Presenting Author Corresponding Author zhou226@usc.edu University of Southern California |
Jessica McBeck j.a.mcbeck@geo.uio.no University of Oslo |
François Renard francois.renard@geo.uio.no University of Oslo |
Yehuda Ben-Zion benzion@usc.edu University of Southern California |
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Simulations of Localization and Coalescence Process Before Large Failure Events
Category
General Session