T51J:
The Influence of Fault Zone Structure on Plate Boundary Tectonics and Earthquakes

Submit an Abstract to this Session



Session ID#: 31251

Session Description:
This session seeks to highlight studies of fault zone properties in relation to transient slip, triggering, and rupture propagation direction across plate boundaries. Probabilistic-hazard source models may overestimate expected earthquakes in California. Paleoseismic and historical data in southern California indicate a 160 year long hiatus in great earthquakes. Factors affecting hazard model performance can include insufficient characterization of transient slip, slip triggering, and fault zone damage properties. These factors may arise in part because the crust is not purely elastic, and compliant material can serve to relieve stress aseismically. Differences in seismic velocities within the crust and fault geometry can control rupture propagation direction and whether earthquakes jump from one segment to another, cascading into larger events. This session encourages results based on geodetic, geologic, and seismic data that illuminate spatial and temporal patterns connecting fault zones with plate boundary deformation.
Primary Convener:  Andrea Donnellan, Jet Propulsion Laboratory, California Institute of Technology, Instrument Systems Section, Pasadena, United States
Conveners:  Yehuda Ben-Zion, University of Southern California, Los Angeles, CA, United States, Ramon Arrowsmith, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States and Stephen DeLong, U.S. Geological Survey, Earthquake Science Center, Moffett Field, California, United States
Chairs:  Andrea Donnellan, 1Jet Propulsion Laboratory, California Institute of Technology, Science Division, Pasadena, CA, United States and Yehuda Ben-Zion, USC, Department of Earth Sciences, Los Angeles, CA, United States
OSPA Liaison:  Andrea Donnellan, 1Jet Propulsion Laboratory, California Institute of Technology, Science Division, Pasadena, CA, United States

Cross-Listed:
  • G - Geodesy
  • NG - Nonlinear Geophysics
  • NH - Natural Hazards
  • S - Seismology
Index Terms:

1207 Transient deformation [GEODESY AND GRAVITY]
1209 Tectonic deformation [GEODESY AND GRAVITY]
7223 Earthquake interaction, forecasting, and prediction [SEISMOLOGY]
8158 Plate motions: present and recent [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Velocity Gradient Across the San Andreas Fault and Changes in Slip Behavior as Outlined by Full non Linear Tomography (231296)
Claudio Chiarabba, Istituto Nazionale di Geofisica e Vulcanologia, Palermo, Italy, Genny Giacomuzzi, Istituto Nazionale di Geofisica Vulcanologia, Rome, Italy and Nicola Piana Agostinetti, Dias, Dublin, Ireland
Rheology of the Seismogenic Crust in Southern California: Comparing Lithotectonic Blocks Defined by Past Tectonics and Major Faults (254083)
Egill Hauksson1, Men-Andrin Meier1 and Zachary E. Ross2, (1)California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, (2)California Institute of Technology, Pasadena, CA, United States
Identifying Fault Connections of the Southern Pacific-North American Plate Boundary Using Triggered Slip and Crustal Velocities (233763)
Andrea Donnellan1, Lisa Grant Ludwig2, John B Rundle3, Jay W Parker4, Robert Granat5, Michael B Heflin6, Marlon Edwin Pierce7, Jun Wang7, Matthew Gunson8 and Gregory A Lyzenga9, (1)1Jet Propulsion Laboratory, California Institute of Technology, Science Division, Pasadena, CA, United States, (2)Univ California, Irvine, CA, United States, (3)UC Davis, Department of Earth and Planetary Sciences, Davis, CA, United States, (4)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (5)Jet Propulsion Laboratory, Pasadena, CA, United States, (6)Jet Propulsion Lab, Pasadena, United States, (7)Indiana University Bloomington, Bloomington, IN, United States, (8)University of California Berkeley, Berkeley, CA, United States, (9)NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Empirical Observations of Surface Ruptures Highlight the Role of Regional Stress Orientation on Earthquake Rupture Propagation (Invited) (263883)
Glenn P Biasi, USGS Geological Survey, Earthquake Science Center, Menlo Park, CA, United States and Steven G Wesnousky, Center for Neotectonic Studies, University of Nevada Reno, Reno, NV, United States
Aftershocks driven by afterslip and fluid pressure sweeping through a fault-fracture mesh (Invited) (281451)
Zachary E. Ross1, Chris Rollins1, Dr. Elizabeth S Cochran, PhD2, Egill Hauksson1, Jean-Philippe Avouac3 and Yehuda Ben-Zion4, (1)California Institute of Technology, Pasadena, CA, United States, (2)U.S. Geological Survey, Earthquake Science Center, Pasadena, United States, (3)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, United States, (4)USC, Department of Earth Sciences, Los Angeles, CA, United States
The effect of segmented fault zones on earthquake rupture propagation and termination (221697)
Yihe Huang, University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, MI, United States
Characterizing the structural maturity of fault zones using high-resolution earthquake locations. (280520)
Clément Perrin, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Felix Waldhauser, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States and Christopher H Scholz, Lamont-Doherty Earth Obs, Palisades, NY, United States
­Tectonic and geomorphic setting of the Pamir Plateau: Insights from InSAR and teleseismic analysis of the 2015 Lake Saurez and 2016 Muji fault earthquake sequence (281861)
Priyamvada Nanjundiah1, Sylvain Barbot2, Shengji Wei1, Paul Tapponnier1, Wanpeng Feng3 and Teng Wang4, (1)Earth Observatory of Singapore, Singapore, Singapore, (2)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (3)Canada Centre for Remote Sensing, Natural Resources Canada, Ottawa, ON, Canada, (4)Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore

See more of: Tectonophysics