T016
Structural Evolution, Mechanics, and Hazards of Geometrically Complex and Multi-segment Fault Systems
Session ID#: 247781
Session Description:
Across many tectonic settings, major active fault systems commonly comprise multiple intersecting, branching or adjacent faults. High-resolution observations - including satellite geodesy, back-projection, and field data - from recent large earthquakes show that these events often rupture multiple fault segments and generate widespread off-fault damage. Over a wide range of timescales, details of the mechanical interactions between segments in complex fault systems remain challenging to untangle using traditional models of fault segmentation. Nonetheless, these interactions appear to influence the seismic and tsunami hazards resulting from complex earthquake ruptures. This session will focus on new observations, laboratory experiments, and models that illuminate how structurally complex multi-segment fault systems form and deform over geologic to seismic-cycle timescales, and how complex faulting affects earthquake cycle processes, seismicity and natural hazards for nearby communities. Submissions are encouraged from a broad range of disciplines including geology, geomorphology, seismology, geodesy, rock mechanics, and geodynamics, among others.
Co-Sponsor(s):
Index Terms:
7230 Seismicity and tectonics [SEISMOLOGY]
8010 Fractures and faults [STRUCTURAL GEOLOGY]
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
8163 Rheology and friction of fault zones [TECTONOPHYSICS]
Primary Convener: James Biemiller, U.S. Geological Survey, Portland, United States
Conveners: Alba Mar Rodriguez Padilla, California Institute of Technology, Pasadena, United States, Alice-Agnes Gabriel, Ludwig-Maximilians-Universität München, Department of Earth and Environmental Sciences, Munich, Germany; University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States and Roland Bürgmann, University of California Berkeley, Earth and Planetary Science, Berkeley, United States
Student/Early Career Convener: Jeena Yun, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States
Crustal stresses and damage evolve throughout the seismic cycle of the Ridgecrest fault zone (Invited) (1858385)
Jared Thomas Bryan, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, William Benjamin Frank, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Cambridge, MA, United States and Pascal Audet, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
Seismogenesis from the Finite Elastic Deformation of Geometric Asperities (1859275)
Victor C Tsai, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States, Naofumi Aso, University of Tokyo, Megro-ku, Japan, Greg Hirth, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States and Jaeseok Lee, Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South)
LINKING STRUCTURAL RESTORATION AND THERMOCHRONOLOGY TO DECODE THE DEFORMATION AND EXHUMATION HISTORY IN THE WESTERN KOHAT FOLD AND THRUST BELT, SUB-HIMALAYAS, PAKISTAN (1865790)
Muhammad Ishfaq1, Humaad Ghani1, Jonas Kley1, Istvan Dunkl2, Syed Saqib Razzaq1, Mr. Mukhtiar Ghani1 and Klaus Wemmer3, (1)University of Göttingen, Department of Structural Geology and Geothermics, Göttingen, Germany, (2)University of Göttingen, Department of Sedimentology and Environmental Geology, Göttingen, Germany, (3)University of Göttingen, Department of Structural Geology and Geothermics, Goettingen, Germany
Kinematics of Evolving Block Boundaries: an example from the Red River Fault, Southeastern Tibetan Plateau (1871258)
Zhuona Bai1, Xuhua Shi2, Yixi Yan1 and George E Hilley3, (1)Zhejiang University, Hangzhou, China, (2)Zhejiang University, School of Earth Sciences, Hangzhou, China, (3)Stanford University, Earth and Planetary Sciences, Stanford, CA, United States
To what extent can displacements near earthquake surface ruptures be accurately measured using optical image correlation? A case study from the 2019 Ridgecrest earthquake (1872790)
Cecilia Martinelli, Université Grenoble Alpes, ISTerre, Grenoble, France, James Hollingsworth, Université Grenoble Alpes, ISTerre, Saint Martin d'Hères, France, Juliette Bertrand, Université Grenoble Alpes, Inria, CNRS, Grenoble INP, LJK, Grenoble, France, Sophie Giffard-Roisin, Institut des Sciences de la Terre, Université Grenoble Alpes, Grenoble, France, Julien Miral, University Grenoble Alpes, Inria, CNRS, Grenoble INP, LJK, Grenoble, France, Marion Thomas, Université de Rennes, Geosciences Rennes, Rennes Cedex, France and Romain Jolivet, École Normale Supérieure, PSL Research University, CNRS UMR 8538, Laboratoire de Géologie, Paris, France
Non-Planar 3D Fault Models from Earthquake Hypocenters (1873314)
Travis Alongi1, Robert Skoumal1, David R Shelly2 and Alexandra E Hatem2, (1)U.S. Geological Survey, Earthquake Science Center, Moffett Field, United States, (2)U.S. Geological Survey, Geologic Hazards Science Center, Golden, United States
Rupture and seismic cycle complexities arise from structural and frictional heterogeneities: insights from large laboratory faults (1873794)
Giuseppe Volpe1, Giacomo Mastella1, Cristiano Collettini1, Marco Maria Scuderi1 and Chris Marone2, (1)Sapienza University of Rome, Rome, Italy, (2)Pennsylvania State University, Department of Geosciences, University Park, United States
How does Inherited Deformation Control the Frictional Behavior of the Wasatch Fault? Insights from Friction Experiments and Microstructural Analyses of the Farmington Canyon Complex (1879821)
Lindsey Broderick, Utah State University, Logan, UT, United States, Kate Murdock, Utah State University, Geosciences, Logan, United States, Srisharan Shreedharan, Utah State University, Department of Geosciences, Logan, United States and Alexis K Ault, Utah State University, Department of Geosciences, Logan, UT, United States
Fault geometry control on the past and active seismicity of a multi-segmented fault system (Western Alps-Ligurian Basin, Italy; CARG Project) (1883779)
Michele Perozzo1, Ludovico Manna1, Niccolo Menegoni1, Matteo Maino2 and Silvio Seno1, (1)University of Pavia, Pavia, Italy, (2)Department of Earth and Environmental Sciences, University of Pavia, Pavia, Italy, Pavia, Italy
Multi-Fault Structure and Rheological Properties in the Hormuz Salt Layer from Co- and Post-seismic Observations of the 2022 Hormozgan Doublet, Iran (1883947)
Xiong Zhao1, Torsten Dahm2, Junle Jiang1 and Caijun Xu3, (1)University of Oklahoma Norman Campus, School of Geosciences, Norman, United States, (2)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (3)School of Geodesy and Geomatics, Wuhan University, Wuhan, China
Lithospheric-scale Structural Controls on the Evolution of the East Anatolian Fault Zone and Associated Seismicity (1892874)
Jonathan R Delph1, Michael H Darin2, Donna L Whitney3, Michael A Cosca4, Christian P Teyssier3, Nuretdin Kaymakci5, Tuna Eken6, Mary R Reid7 and Susan Beck8, (1)Purdue University, Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States, (2)Department of Geology and Mineral Industries Oregon, Grants Pass, United States, (3)University of Minnesota Twin Cities, Department of Earth & Environmental Sciences, Minneapolis, United States, (4)USGS, Denver, CO, United States, (5)Middle East Technical University, Ankara, Turkey, (6)Istanbul Technical University, Department of Geophysical Engineering, The Faculty of Mines, Istanbul, Turkey, (7)Northern Arizona Univ, Flagstaff, AZ, United States, (8)University of Arizona, Geosciences, Tucson, United States
The Role of Strike-Slip Faulting in an Evolving Subduction Termination, North Canterbury, Aotearoa New Zealand (1896310)
Sage Moore1, Colin B Amos2, Nathan A Niemi3, Timothy A Stahl4, Tammy M Rittenour5 and Claire Brownlie4, (1)Western Washington University, Bellingham, WA, United States, (2)Western Washington University, Geology Department, Bellingham, WA, United States, (3)University of Michigan, Earth and Environmental Sciences, Ann Arbor, United States, (4)University of Canterbury, School of Earth and Environment, Christchurch, New Zealand, (5)Utah State University, Department of Geosciences, Logan, UT, United States
A Multidisciplinary Assessment of Reno Earthquake Hazard: Regional Ground Motion Analysis and Paleoseismology on Soil from the Mt. Rose Fault (1897922)
Carter W Dills1, Daniel T Trugman1, Rich David Koehler2, Kathleen Rodrigues3 and Steven G Wesnousky4, (1)University of Nevada Reno, Nevada Seismological Laboratory, Reno, United States, (2)University of Nevada Reno, Reno, NV, United States, (3)Desert Research Institute, Reno, NV, United States, (4)University of Nevada Reno, Center for Neotectonic Studies, Reno, United States
Characterizing Surface Expression of the Gofar Transform Fault Using High-Resolution Bathymetry Data (1900893)
Evan Saltman, Boston College, Chestnut Hill, MA, United States, Mark D Behn, Boston College, Earth and Environmental Sciences, Chestnut Hill, United States, Emily C Roland, Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, Paige Koenig, USGS, Geology, Geophysics, and Geochemistry Science Center, Denver, United States, Jianhua Gong, Indiana University Bloomington, Bloomington, IN, United States, Jessica M Warren, University of Delaware, Earth Sciences, Newark, DE, United States, Jeffrey Joseph McGuire, Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, United States, Margaret S Boettcher, University of New Hampshire, Durham, NH, United States and Wenyuan Fan, Scripps Institution of Oceanography, University of California San Diego, Institute of Geophysics and Planetary Physics, La Jolla, United States
Fully Dynamic Earthquake Cycle Simulation of the Southern San Andreas Fault: Effects of Geometric Complexity on Earthquake Rupture Behavior (1905735)
Hasti Bordbar1, Benchun Duan1, Qingjun Meng2, Zhi Shang1 and Zizhuang Tang1, (1)Texas A&M University College Station, Department of Geology & Geophysics, College Station, United States, (2)University of California Los Angeles, Los Angeles, United States
A Geometry-Driven Perspective on Earthquake Dynamics (Invited) (1909913)
Jaeseok Lee, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States, Victor C Tsai, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States, Greg Hirth, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States, Daniel T Trugman, University of Nevada Reno, Nevada Seismological Laboratory, Reno, United States and Avigyan Chatterjee, Lawrence Livermore National Laboratory, Livermore, United States
Influence of Seamount Subduction on Long-Term Deformation and the Seismic Cycle: A Coupled Modeling Approach (1918455)
Alexis Gauthier1, Dave May2, Nadaya Cubas1, Alice-Agnes Gabriel3, Anthony Jourdon1 and Laëtitia Le Pourhiet1, (1)Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, Paris, France, (2)ETH Zurich, Zurich, Switzerland, (3)Ludwig-Maximilians-Universität München, Department of Earth and Environmental Sciences, Munich, Germany
Conjugated Faulting during the July 25, 2023 Mw 5.5 Earthquake Sequence in Kozan, Southeastern Türkiye (1934402)
Phuc Mach1, Zhigang Peng1, Xu Si1, Oluwaseyifunmi Adeboboye1, Ekrem Zor2, Mehmet Ergin2 and Eric A Sandvol3, (1)Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, United States, (2)TUBITAK, The Scientific and Technological Research Council of Turkey, Marmara Research Center, Earth and Marine Sciences Institute, Gebze, Turkey, (3)University of Missouri, Department of Geological Sciences, Columbia, United States
How Do Earthquakes Get Big? (1934821)
Will Steinhardt, University of California Santa Cruz, Santa Cruz, CA, United States and Emily Brodsky, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States
High-Precision Aftershock Distribution Highlights Active Fault Geometry Control of the 2024 Mw 7.5 Noto Peninsula Earthquake (1939942)
Hidenobu Takahashi1, Yasuhira Aoyagi1, Keisuke Yoshida2, Haruo Kimura3, Eiji Kurashimo4 and Shin'ichi Sakai5, (1)Central Research Institute of Electic Power Industry, Abiko, Japan, (2)Tohoku University, Graduate School of Science, Sendai, Japan, (3)Central Research Institute of Electric Power Industry, Abiko, Japan, (4)The University of Tokyo, Earthquake Research Institute, Tokyo, Japan, (5)The University of Tokyo, Interfaculty Initiative in Information Studies, Tokyo, Japan
Rupture Jumping Across Fault Stepovers: An Extension of Rupture-Tip Theory of Elongated Earthquakes (1943685)
Vincent van der Heiden1, Huihui Weng2, Jean-Paul Ampuero2 and Ylona van Dinther1, (1)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands, (2)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France
Linking Plate Tectonics And Earthquake Occurrence In The Central Apennines Through Fully Dynamic Seismo-Thermo-Mechanical Modeling (1944223)
Maaike Fonteijn1,2, Alexander Koelzer2, Erwan Pathier1, Anne Socquet1 and Ylona van Dinther2, (1)Université Grenoble Alpes, ISTerre, Grenoble, France, (2)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Late Quaternary Evolution of the Cascadia Outer Wedge Constrained by Structural Modeling (Invited) (1950906)
Anna Ledeczi1, Harold J Tobin1, Nathaniel C Miller2 and Madeleine C Lucas1, (1)University of Washington Seattle, Earth and Space Sciences, Seattle, WA, United States, (2)USGS, Coastal and Marine Science Center Woods Hole, Woods Hole, MA, United States
Deformation style in the Blaini Formation lying on the hanging wall of the Main Boundary Thrust (MBT), Garhwal Lesser Himalaya, India (1951398)
Bhagirathi Panigrahi, Indian Institute of Technology Roorkee, Department of Earth Sciences, Roorkee, India and D C Srivastava, Indian Institute of Technology Roorkee, Department of Earth Science, Roorkee, India
Characterization of Ridgecrest Mw 7.1 Earthquake Surface Ruptures by Hierarchical Clustering; Implications for Fault Mapping and Connectivity (1953361)
Isabelle Rocamora1, James Hollingsworth2, Sophie Giffard-Roisin3, Léa Pousse Beltran3 and Yehuda Ben-Zion4, (1)University Grenoble Alpes - ISTerre - CNES, Grenoble, France, (2)Université Grenoble Alpes, ISTerre, Saint Martin d'Hères, France, (3)Institut des Sciences de la Terre, Université Grenoble Alpes, Grenoble, France, (4)University of Southern California, Department of Earth Sciences and Statewide California Earthquake Center, Los Angeles, United States
The spectrum of long-term dynamics in fault networks: synchronization, alternation, supercycles, and chaos driven by quasistatic elastic interactions (1959523)
Alba Mar Rodriguez Padilla1, Alexis Sáez2 and Jean-Philippe Avouac2, (1)California Institute of Technology, Pasadena, United States, (2)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, United States
Geometric and kinematic analyses of the Garlock and Owl Lake faults from LiDAR-based geologic mapping, southern California (1959829)
Hunter Harger1, Jasmyn Garland2, Victoria Sloan2, Ricardo Nuno Gutierrez2, Taylor Murphy3, Sean G Polun3, Francisco G Gomez3, Tandis Bidgoli2 and Jonathan Rodriquez2, (1)California State University San Bernardino, San Bernardino, CA, United States, (2)California State University San Bernardino, Department of Geological Sciences, San Bernardino, United States, (3)University of Missouri, Department of Geological Sciences, Columbia, United States
Establishing the long-term slip history of the Elsinore fault in the northern Santa Ana Mountains, southern California (1969395)
Tandis S. Bidgoli1, Gideon S El-Rahi1, Nirusha Shrestha2 and Daniel Sturmer2, (1)California State University San Bernardino, Department of Geological Sciences, San Bernardino, United States, (2)University of Cincinnati, Department of Geosciences, Cincinnati, United States
Seismic Hazard and Rift Propagation in the East Africa Rift System: Insights from Machine Learning Earthquake Detection and Focal Mechanism Analysis (1980032)
Nnamdi Ajah1, Jay Pulliam1 and Emmanuel Atem Njinju2, (1)Baylor University, Department of Geosciences, Waco, United States, (2)Baylor University, Department of Geosciences, Waco, TX, United States
Coseismic interactions between plate boundary structures and crustal faults (1980051)
Matthew W Herman, California State University Bakersfield, Department of Geological Sciences, Bakersfield, CA, United States, Kevin P Furlong, Penn State Univ, University Park, United States and Kirsty A McKenzie, James Madison University, Department of Geology and Environmental Science, Harrisonburg, VA, United States
Plutonic Piercing Point Geochronology Reveals Long-Term Asymmetric Uplift Along the Multi-Segmented Southern San Andreas Fault (1980333)
Alexia Rojas, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States, Emily HG H. G. Cooperdock, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, United States, Florian Hofmann, University of Alaska Fairbanks, Fairbanks, AK, United States and Jade Star Lackey, Pomona College, Claremont, United States
From collision to subduction: thermal-kinematic inversions constrain plate boundary structure and dip-slip activity in southwestern New Zealand (1986447)
Andre Mere, University of California Riverside, Riverside, United States; Lettis Consultants International, Inc., Valencia, United States, Nicolas C Barth, University of California Riverside, Riverside, CA, United States, Diane Seward, Victoria University Wellington, Wellington, New Zealand and Devin McPhillips, U.S. Geological Survey, Pasadena, United States
REVIEW OF THE PERNICANA FAULT SYSTEM (MT. ETNA, SICILY) DYNAMICS THROUGH 40 YEARS OF GROUND DEFORMATION MEASUREMENTS (1992398)
Alessandro Bonforte1, Stefano Branca2, Giuseppe Brandi3, Elena Cubellis3, Salvatore Gambino4, Francesco Guglielmino4, Giuseppe Puglisi5, Francesco Obrizzo3 and Umberto Tammaro3, (1)Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Palermo, Italy, (2)Istituto Nazionale di Geofisica e Vulcanologia, Etna Observatory, Catania, Italy, (3)Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Napoli, Italy, (4)Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Catania, Italy, (5)INGV National Institute of Geophysics and Volcanology, Rome, Italy
