S015
Mechanical complexity and structural heterogeneity in diffuse fault zones: observation, modeling and experiments
Session ID#: 161379
Session Description:
Multiple scales, multi-physics interactions and nonlinearities govern earthquake source processes, rendering the understanding of how faults slip a grand challenge of seismology. Earthquake fault zones are more complex, both geometrically and rheologically than an idealized infinitely thin plane embedded in linear elastic material. Complex volumetric failure may lead to complexity in the nucleation process (e.g., instantaneous vs.cascading ), rupture styles (e.g., pulses or cracks, sub-Rayleigh vs.super-shear), slip distribution and energy balance. A realistic understanding of co-seismic, post-seismic and interseismic slip across diffuse fault zones should account for multi-physics coupling, nonlinear visco-elasto-plastic rock rheologies, natural heterogeneities, etc. Furthermore, diffuse fault zones evolve as potentially hierarchical fault structures over space and time.
This session encourages contributions shedding light on, but not limited to, volumetric faulting processes across different scales in both space and time. We welcome interdisciplinary and focused contributions that explore observations, laboratory experiments, numerical modeling and theoretical studies.
Index Terms:
7209 Earthquake dynamics [SEISMOLOGY]
7215 Earthquake source observations [SEISMOLOGY]
Primary Convener: Duo Li, Ludwig-Maximilians-Universität (LMU) München, Earth and Environmental Sciences, Munich, Germany
Conveners: Yifang Cheng, University of Oklahoma Norman Campus, Norman, United States, Yihe Huang, University of Michigan Ann Arbor, Earth and Environmental Sciences, Ann Arbor, MI, United States and Alice-Agnes Gabriel, Ludwig-Maximilians-Universität, Earth and Environmental Sciences, Munich, Germany
Student/Early Career Convener: Duo Li, Ludwig-Maximilians-Universität (LMU) München, Earth and Environmental Sciences, Munich, Germany
Connecting Local Features of Coseismic Rupture to Large-scale Properties of Seismicity (1041829)
Davide Zaccagnino, Sapienza University of Rome, Rome, Italy, Luciano Telesca, Institute of Methodologies for Environmental Analysis, National Research Council (CNR-IMAA), Tito Scalo (PZ), Italy and Carlo Doglioni, Univ La Sapienza, Rome, Italy
Co-evolution of fault zones and seismicity enabled by off-fault plasticity (Invited) (1044803)
Ahmed E Elbanna, University of Illinois at Urbana Champaign, Department of Civil and Environmental Engineering, Urbana, IL, United States, Md Shumon Mia, University of Illinois at Urbana Champaign, Urbana, United States and Mohamed Abdelmeguid, University of Illinois at Urbana Champaign, Urbana, IL, United States
Fracture network localization in intact and damaged Westerly granite during triaxial compression with fluids (Invited) (1046478)
Jessica McBeck, University of Oslo, Oslo, Norway, Yehuda Ben-Zion, University of Southern California, Department of Earth Sciences and Southern California Earthquake Center, Los Angeles, United States, Benoit Cordonnier, ESRF European Synchrotron Radiation Facility, Grenoble, France and Francois Renard, University Joseph Fourier Grenoble, Grenboble, France
Influence of Solid-Fluid Interactions and Dilatancy on Seismic Cycles in a Poro-Visco-Elasto-Plastic Fault Structure (1065320)
Betti Hegyi, Structural Geology and Tectonics Group, Geological Institute, ETH Zurich, Zurich, Switzerland, Luca Dal Zilio, Seismology and Geodynamics, Institute of Geophysics, ETH Zurich, Zurich, Switzerland, Whitney M Behr, ETH Zurich, Structural Geology and Tectonics Group, Geological Institute, Zurich, Switzerland and Taras Gerya, Geophysical Fluid Dynamics, Institute of Geophysics, ETH Zurich, Zurich, Switzerland
Fracture mesh faulting in the swarm-like 2020 Maacama sequence revealed by high-precision earthquake detection, location, and focal mechanisms (1068921)
David R Shelly, USGS Geologic Hazards Science Center, Golden, CO, United States, Robert Skoumal, U.S. Geological Survey, Earthquake Science Center, Moffett Field, CA, United States and Jeanne Hardebeck, USGS, Moffett Field, United States
Insights on fault damage zone structures from the azimuthal variation in the stacked spectra of earthquake clusters (1075346)
Jing Ci Neo, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Yihe Huang, University of Michigan Ann Arbor, Earth and Environmental Sciences, Ann Arbor, MI, United States and Dongdong Yao, China University of Geosciences, Wuhan, China
Imaging hydraulic properties along fault zones with earthquake swarms in southern California (1090601)
Valeria Villa, California Institute of Technology, Pasadena, United States, Zachary E. Ross, California Institute of Technology, Seismological Laboratory, Pasadena, United States and Elizabeth S Cochran, U.S. Geological Survey, Earthquake Science Center, Pasadena, United States
Investigation of Bimaterial Interfaces in the Western Marmara Region using Fault Zone Head Waves (1096406)
Burcak Gorgun1, Esref Yalcinkaya1, Ethem Gorgun1, Marco Bohnhoff2 and Hakan Alp3, (1)Istanbul University - Cerrahpasa, Department of Geophysical Engineering, Istanbul, Turkey, (2)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (3)Istanbul University, Engineering Faculty Department of Geophysical Engineering, Istanbul, Turkey
Detection of Fault Zone Head Waves and the Fault Interface Imaging in the Xianshuihe-Anninghe Fault Zone (Eastern Tibetan Plateau) (1099777)
Longtan Wang, Peking University, Beijing, China, Yijian Zhou, UC, Riverside, Riverside, United States, Shiyong Zhou, ITAG Institute of Theoretical and Applied Geophysics, Peking University, Beijing, China and Hao Zhang, University of Southern California, Department of Earth Sciences, Los Angeles, United States
Heterogeneous Coseismic Stress State Describes Off-fault Fractures Orientation in the 2019 Ridgecrest Sequence (1113406)
Enrico Milanese, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Cambridge, MA, United States and Camilla Cattania, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Cambridge, United States
Rock and fault rheology explain differences between on fault and distributed seismicity (1123847)
Cristiano Collettini1, Massimiliano Rinaldo Barchi2, Nicola De Paola3, Fabio Trippetta4 and Elisa Tinti1, (1)Sapienza University of Rome, Rome, Italy, (2)University of Perugia, Perugia, Italy, (3)University of Durham, Department of Earth Sciences, Durham, United Kingdom, (4)Università degli Studi di Roma La Sapienza, Rome, Italy
Viscoplastic modeling of deformation in synthetically damaged rocks using a Perzyna viscoplasticity law (1163960)
Mayukh Talukdar, University of Wisconsin Madison, Geological Engineering Program, Madison, WI, United States and Hiroki Sone, University of Wisconsin, Geological Engineering Program, Madison, WI, United States
A Comparative Analysis of Continuum Plasticity, Viscoplasticity and Phase-field Models for Earthquake Sequence Modeling (1178770)
Mohsen Goudarzi1, Ylona van Dinther1 and Taras Gerya2, (1)Utrecht University, Utrecht, Netherlands, (2)Geophysical Fluid Dynamics, Institute of Geophysics, ETH Zurich, Zurich, Switzerland
Advancing the Understanding of How 3D Fault Geometry Controls the Kinematics of Earthquake Swarms (1189599)
Min Liu1, LU LI2, Miao Zhang1, Xinglin Lei3, Mladen R Nedimovic4, Alexandre Plourde5, Weitao Wang2 and Hongyi Li6, (1)Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada, (2)Institute of Geophysics, China Earthquake Administration, Beijing, China, (3)Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan, (4)National Facility for Seismic Imaging (NFSI), Halifax, NS, Canada, (5)Geological Survey of Canada Atlantic, Dartmouth, NS, Canada, (6)China University of Geosciences (Beijing), School of Geophysics and Information Technology, Beijing, China
