Room: Ballroom
Date: 4/19/2023
Session Time: 8:00 AM to 5:45 PM (local time)
Above the Seismogenic Zone: Fault Damage and Healing in the Shallow Crust
Fault damage zones provide a window into the inelastic processes and products that result from coseismic stress changes. The spatial extent of fault damage during earthquakes is greatest in the upper-most kilometers of the crust, above the seismogenic zone. Inelastic processes within this volume modify the bulk long-term properties of the shallow crust, increasing local seismic hazard through enhanced shaking. Fault damage zones have attracted the interest of a broad range of geoscientists because of their relevance to fundamental earthquake physics problems, i.e., the earthquake energy balance, strong ground motions and near fault fluid flow. Higher resolution datasets, a growing number of observations and increased computational power have advanced our understanding of the spatial extent, physical properties and time-integrated evolution of the shallow portion of damage zones. Our understanding of fault damage zones, the processes that form them and their feedbacks with various phases of the earthquake cycle is improving; however, there remain many unanswered questions such as the mechanism and rate of fault healing above the seismogenic zone, the role of subsidiary faults on earthquake nucleation and a complete model that extends damage observed at the surface to seismogenic depth.
In this session, we welcome contributions and recent advances in the quantitative understanding of the shallow properties of fault damage zones. We are particularly interested in contributions that explore and combine observations, laboratory experiments, numerical modeling and theoretical studies.
Conveners
Travis Alongi, University of California, Santa Cruz (talongi@ucsc.edu)
Alba M. Rodríguez Padilla, University of California, Davis (arodriguezpadilla@ucdavis.edu)
Ashley W. Griffith, Ohio State University (griffith.233@osu.edu)
Ahmed Elbanna, University of Illinois Urbana-Champaign (elbanna2@illinois.edu)
Prithvi Thakur, University of Michigan (prith@umich.edu)
Poster Presentations
| Participant Role | Details | Action |
|---|---|---|
| Submission | The Healing Process and Healing Time Estimate of the Longmenshan Fault After the Wenchuan Earthquake | View |
| Submission | The Competitive Effects of On-fault Normal Stress and Off-fault Seismic Velocity Change on Seismic Cycles | View |
| Submission | The Palos Verdes Fault Damage Zone From the Seafloor to the Basement: Revealed Using Multi-Resolution Controlled Source Seismic Reflection Datasets | View |
| Submission | An Experimental Perspective on the Formation of Pulverized Rocks During Transient Coseismic Dilatancy | View |
| Submission | A New 3-D Model of the Newport-Inglewood Fault at Long Beach, California, and Its Implication for Earthquake Rupture Propagation and Hazards | View |
| Submission | Combining Dark Fiber and Seismic Interferometry to Measure Physical Properties of Faults in the Imperial Valley | View |
| Submission | Seismic Identification and Location of Blind, Near-Vertical Faults in Granitic Rocks With Application to Wide-Ranging Geologic Settings | View |
| Submission | Investigating the Causative Mechanisms of Widely Distributed Fracturing Around the 2020 m6.5 Monte Cristo Range Earthquake Rupture, Nevada Usa | View |
Above the Seismogenic Zone: Fault Damage and Healing in the Shallow Crust [Poster]
Description