G013:
Near-Surface Structure and the Mechanics of Shallow Fault Slip





Session ID#: 22584

Session Description:
Despite application of various geologic and geophysical methods, fault-related deformation in the shallow crust remains poorly understood. For example, geomorphic mapping and paleoseismology recover displacement across discrete fault traces, but cannot resolve slip at depth. Conventional geodetic measurements (e.g., InSAR, GNSS) capture deformation over larger regions and can infer slip at depth, but lack near-field data necessary to constrain shallow slip. Similarly, near-surface fault architecture and rheology are constrained using borehole data, rock mechanics experiments, and seismic tomography, each providing valuable, yet isolated, windows into the physics of shallow faulting. These varied approaches may lead to surprisingly different inferred slip rates, shallow slip deficits, predicted near-field ground motions, and conflicting interpretations of off-fault deformation; affecting our understanding of fault physics and probabilistic seismic hazard analysis. This session welcomes approaches that seek to reconcile these disparate observations and create unified models of the structure and deformation of the shallow crust.
Primary Convener:  Sarah E Minson, U.S. Geological Survey, Earthquake Science Center, Menlo Park, CA, United States
Conveners:  Johanna M Nevitt, Eileen L Evans and Benjamin A. Brooks, U.S. Geological Survey, Earthquake Science Center, Menlo Park, CA, United States
Co-Organized with:
Geodesy, Seismology, and Tectonophysics

Abstracts Submitted to this Session:

Norman H Sleep, University of California Berkeley, Integrative Biology, Berkeley, CA, United States
Nicholas W Hayman, Institute for Geophysics, Austin, TX, United States
Jie Li1, Bin Zhao2, Wang Xiaoqiang3, Liu Daiqing3 and Alixiati Yushan3, (1)Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumq, China, (2)Institute of Seismology, China Earthquake Administration, Wuhan, China, (3)Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi, China
Ryan Michael Yohler1, Noel M Bartlow1, Laura M Wallace2,3 and Charles A Williams4, (1)University of Missouri Columbia, Columbia, MO, United States, (2)University of Texas Institute for Geophysics, Austin, TX, United States, (3)University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, (4)GNS Science, Lower Hutt, New Zealand
Yuji Himematsu and Masato Furuya, Hokkaido University, Sapporo, Japan
Mimmo Palano, Istituto Nazionale di Geofisica e Vulcanologia, Palermo, Italy
T Ben Thompson and Brendan J Meade, Harvard University, Cambridge, MA, United States
Yasuto Kuwahara, Geological Survey of Japan, AIST, Tsukuba, Japan
Johanna Nevitt1, Benjamin A. Brooks1, Rufus Catchings1, Mark Goldman2, Coyn Criley1, Joanne H Chan1, Craig L Glennie3, Todd L Ericksen1 and Christopher M Madugo4, (1)U.S. Geological Survey, Earthquake Science Center, Menlo Park, CA, United States, (2)U.S. Geological Survey, Menlo Park, CA, United States, (3)University of Houston, Geosensing System Engineering and Science, Houston, TX, United States, (4)Pacific Gas and Electric Company, San Francisco, CA, United States
Michele L Cooke and Jennifer L Beyer, University of Massachusetts Amherst, Amherst, MA, United States
Amirhossein Tayyebi, University of Houston, Department of Civil and Environmental Engineering, Houston, TX, United States, Jennifer Telling, University of Houston, Department of Civil & Environmental Engineering, Houston, TX, United States, Kenneth W Hudnut, USGS, Pasadena, CA, United States, Craig A Davis, Water System Resilience Program Manager, Los Angeles Department of Water and Power, Los Angeles, CA, United States and Craig L Glennie, National Center for Airborne Laser Mapping, Houston, TX, United States
Rafael V Almeida, Eric O Lindsey, Kyle Bradley, Judith Hubbard, Sharadha Sathiakumar, Rishav Malick and Emma Hill, Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore
Luke N J Wedmore, University of Leeds, Leeds, United Kingdom, Laura C Gregory, University of Leeds, Leeds, LS2, United Kingdom, Kenneth J W McCaffrey, University of Durham, Durham, United Kingdom, Max Wilkinson, Geospatial Research Ltd, Department of Earth Sciences, Durham University, Durham, United Kingdom and Richard J Walters, Durham University, COMET, Department of Earth Sciences, Durham, United Kingdom
Charles L Werner1, Brett Baker2, Pietro Milillo3, Christophe Magnard1, Tazio Strozzi1 and Urs Wegmüller1, (1)Gamma Remote Sensing, Guemligen, Switzerland, (2)Santa Clara Valley Water District, San Jose, CA, United States, (3)California Institute of Technology, Pasadena, CA, United States
Robert Wayne Zinke1, James Hollingsworth2, James Francis Dolan1 and Russ James Van Dissen3, (1)University of Southern California, Los Angeles, CA, United States, (2)ARUP, London, United Kingdom, (3)GNS Science, Lower Hutt, New Zealand
Nancye H Dawers, Tulane University, New Orleans, LA, United States and Chris McLindon, New Orleans Geological Society, New Orleans, LA, United States
Christopher William Douglas Milliner1, Roland Burgmann2, Teng Wang3, Asaf Inbal4, David P Bekaert5, Cunren Liang6 and Eric Jameson Fielding6, (1)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (2)UC Berkeley Seismological Laboratory, Berkeley, CA, United States, (3)Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore, (4)Berkeley Seismological Lab, Berkeley, CA, United States, (5)JPL/NASA/Caltech, Pasadena, CA, United States, (6)Jet Propulsion Lab Caltech, Pasadena, CA, United States
Felipe del Valle1, Carlos Marquardt2, Sara Elgueta3 and Dominique Valdivia2, (1)Organization Not Listed, Washington, DC, United States, (2)Pontifical Catholic University of Chile, Departamento de Ingeniería Estructural y Geotécnica, Santiago, Chile, (3)CEGA, Santiago, Chile
Benjamin T Crosby, Idaho State University, Pocatello, ID, United States, David W Rodgers, Idaho State Univ, Pocatello, ID, United States and Ian H Lauer, Idaho State University, Geosciences, Idaho Falls, ID, United States

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