Room: 208C
Date: 4/19/2023
Session Time: 4:30 PM 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)
Oral Presentations
| Participant Role | Details | Start Time | Minutes | Action |
|---|---|---|---|---|
| Submission | Modeling the Viscoplastic Deformation of Damaged Rocks Using a Perzyna Viscoplasticity Law | 04:30 PM | 15 | View |
| Submission | Spatiotemporal Variations in Shallow Damage Zone Mechanisms Along the Southern Elsinore Fault | 04:45 PM | 15 | View |
| Submission | High-Resolution Fault Zone Imaging With Distributed Acoustic Sensing | 05:00 PM | 15 | View |
| Submission | Inferring Fault Zone Structure from the Azimuthal Variation in the Stacked P-spectra of Earthquake Clusters | 05:15 PM | 15 | View |
| Submission | Do Faults Localize as They Mature? Insight From 17 Continental Strike-slip Surface Rupturing Events (Mw > 6.1) Measured by Optical and Radar Imaging Data | 05:30 PM | 15 | View |
| Total: | 75 Minute(s) |
Above the Seismogenic Zone: Fault Damage and Healing in the Shallow Crust
Description