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Session Proposal: Subduction Zone Deformation Throughout the Earthquake Cycle: Observations and Models (AGU25)

G019
Subduction Zone Deformation Throughout the Earthquake Cycle: Observations and Models

Session ID#: 252042

Session Description:
Subduction zones are the source of Earth's largest earthquakes, posing significant hazards to densely populated coastal regions. Recent advances in space geodesy have greatly improved our ability to monitor complex deformation processes throughout the earthquake cycle. We invite contributions investigating the full spectrum of subduction zone processes, including interseismic coupling, coseismic slip, slow slip events, fault creep, episodic tremor and slip (ETS), postseismic afterslip, and viscoelastic mantle flow transients. We particularly encourage studies that integrate space geodetic data (e.g., GNSS, InSAR) with seismic, paleoseismic, and geological observations, as well as numerical modeling to illuminate the physical mechanisms driving these processes, their spatial distribution and temporal evolution.
Co-Sponsor(s):
  • S - Seismology
  • T - Tectonophysics
Index Terms:

1207 Transient deformation [GEODESY AND GRAVITY]
1242 Seismic cycle related deformations [GEODESY AND GRAVITY]
7240 Subduction zones [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]
Primary Convener:  Kaj M Johnson, Indiana University Bloomington, Department of Earth and Atmospheric Sciences, Bloomington, IN, United States
Conveners:  Kelin Wang, Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada, Camilla Cattania, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Diego Melgar, University of Oregon, Department of Earth Sciences, Eugene, United States
Student/Early Career Convener:  Nicolás Castro Perdomo, Indiana University Bloomington, Department of Earth and Atmospheric Sciences, Bloomington, IN, United States
 
Legacy Geodetic Data Uncovers Shallow Rupture of the 1946 Mw 7.3 Vancouver Island Earthquake and Its Implications to Forearc Tectonic Settings (1856018)
Junyan Yang, CEA China Earthquake Administration, Institute of Earthquake Forecasting, Beijing, China and Yan Jiang, Geological Survey of Canada Sidney, Sidney, Canada
 
Implications of Rheological Structure and Afterslip on Aftershock Evolution from Postseismic Deformation of the 2015 Mw 8.3 Illapel Earthquake (1858064)
Zhihao Wang1 and Yan Hu1,2, (1)University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China, (2)Deep Space Exploration Laboratory, Institute of Deep Space Sciences, Hefei, China
 
Postseismic Deformation Following the 2011 Mw=9 Tohoku Earthquake Over 13 Years: Observations and Modelling (Invited) (1858907)
Tianhaozhe Sun1,2, Fumiaki Tomita3, Jiangheng He1, Takeshi Iinuma4, Motoyuki Kido5, Yusaku Ohta6, Ryota Hino3 and Kelin Wang1,2, (1)Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada, (2)University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, (3)Tohoku University, Graduate School of Science, Sendai, Japan, (4)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Research Institute for Marine Geodynamics, Kanagawa, Japan, (5)Tohoku University, International Research Institute of Disaster Science, Sendai, Japan, (6)Tohoku University, Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Sendai, Japan
 
The transition from flat to dipping subduction in south Peru and its impact on seismicity and deformation (Invited) (1862244)
Anne Socquet, University Grenoble Alpes, ISTerre Institute of Earth Sciences, Grenoble, France, Caroline Chalumeau, Universite Grenoble Alpes, ISTerre Institute of Earth Sciences, Grenoble, France, Sebastien Chevrot, Observatoire Midi Pyrenees, Toulouse, France, Bertrand Lovery, Grenoble Alpes University, ISTerre Institute of Earth Science, Grenoble, France, Mohamed Chlieh, IRD, CNRS, Université Grenoble Alpes, ISTerre, Grenoble, France, Mathilde Radiguet, Université Grenoble Alpes, ISTerre, Grenoble, France, Juan Carlos Villegas Lanza, Instituto Geofísico del Perú, Unidad de Geodesia Espacial, Lima, Peru, Jannes Münchmeyer, ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, Edmundo Norabuena, Instituto Geofisico Del Peru, Lima, Peru, Hernando Tavera, Instituto Geofísico del Perú, Lima, Peru, Marie-Pierre Doin, Université Grenoble Alpes, Grenoble, France, Hugo Sanchez Reyes, University Grenoble Alpes, ISTerre, Grenoble, France, Vadim Monteiller, LMA, Aix-Marseille University, Marseille, France and Li-Yu Kan, GET, Observatoire Midi Pyrenees, Toulouse, France
 
Creep on the Precordillera-Agrio Décollement During the 2010 Maule, Chile, Earthquake (1875933)
Mara Figueroa Berroca1,2, Demian Gomez1, Michael G Bevis1, Andres Folguera3, W. Ashley Griffith1, Robert Smalley Jr4, Silvana Liz Spagnotto5, Bennett Kellmayer1, Patrick Smith1, Dana Caccamise6 and Eric C Kendrick1, (1)The Ohio State University, School of Earth Sciences, Columbus, United States, (2)Jet Propulsion Laboratory, Pasadena, United States, (3)Instituto de Estudios Andinos, Universidad de Buenos Aires, Argentina, (4)University of Memphis, Center for Earthquake Research and Information, Memphis, TN, United States, (5)Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina, (6)NOAA National Geodetic Survey, Silver Spring, United States
 
From Lima to Santiago, Mapping and Bayesian Inference of Interseismic Loading Along the Peru-Chile Megathrust (1882173)
Yuan-Kai Liu1, Rishav Mallick2, Leonid Pereiaslov1 and Mark Simons1, (1)California Institute of Technology, Pasadena, United States, (2)Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore
 
3D Simulations of Subduction Zones Earthquakes: Understanding the Mechanisms of Giant Earthquakes (1883493)
Juntao Tao, Fabio A Capitanio and Peter Graham Betts, Monash University, School of Earth, Atmosphere and Environment, Melbourne, VIC, Australia
 
Bridging the gap between subduction dynamics and the long-term strength of the Sunda megathrust (1896371)
Fabio A Capitanio1, Thyagarajulu Gollapalli2, Juan Carlos Graciosa3, Radhakrishna Munukutla4, Luca Dal Zilio5, Adam Beall2 and Mohd Zuhair6, (1)Monash University, School of Earth, Atmosphere and Environment, Melbourne, VIC, Australia, (2)Monash University, Melbourne, Australia, (3)Australian National University, Canberra, Australia, (4)Indian Institute of Technology Bombay, Mumbai, India, (5)Earth Observatory of Singapore, Singapore, Singapore, (6)Nanyang Technological University, Singapore, Singapore
 
The Search for Time-Dependent Coupling Changes on the Plate Interface following the Great Earthquakes of Chile (1899478)
Angikar Roy, University of Kansas, Lawrence, United States and Noel M Jackson, University of Kansas, Lawrence, KS, United States
 
Dynamic modeling of the 2010 Mw 7.8 Mentawai tsunami earthquake with wedge inelasticity (1903104)
Ruei-Jiun Hung, University of Kentucky, Lexington, KY, United States and Shuo Ma, San Diego State University, San Diego, CA, United States
 
Exploring the Impact of Heterogeneous Earth Structure on Surface Deformation Caused by the 2011 Tohoku Earthquake (1906821)
Leah Langer, Tel Aviv University, Tel Aviv, Israel and Kathryn Materna, University of Colorado at Boulder, Boulder, United States
 
The importance of realistic elastic properties in the inversion of onshore and offshore geodetic data for interseismic coupling at subduction zones (1910018)
Laura M Wallace, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Charles A Williams Jr, GNS Science, Lower Hutt, New Zealand
 
Deep Seamount Subduction Beneath Coastal Ecuador Revealed by High-Resolution Seismic Tomography: Dual Role in Rupture Initiation and Rupture Barrier (1924246)
Gabriela Ponce1, Anne Meltzer1, Alexander Wickham-Piotrowski1, Susan Beck2, Mario Calixto Ruiz3, Stephen Hernandez3 and Monica Segovia3, (1)Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States, (2)University of Arizona, Geosciences, Tucson, United States, (3)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador
 
Active Protothrusts and Fluid Highways: Seismic Noise Reveals Hidden Subduction Dynamics in Cascadia (1930864)
Maleen Kidiwela, University of Washington School of Oceanography, Seattle, WA, UNITED STATES, Marine Denolle, University of Washington Seattle Campus, Department of Earth and Space Sciences, Seattle, United States, William S D Wilcock, University of Washington Seattle Campus, School of Oceanography, Seattle, United States and Kuan-Fu Feng, University of Utah, Department of Earth and Space Sciences, Salt Lake City, United States
 
Sliver Tectonics, Insights from Three-Dimensional Oblique Deformation Models (1931868)
Nathalie Chavarria1, Andrew Vern Newman1, Kristin D Morell2, Cyril Muller3, Pierre Boymond3 and Marino Protti3, (1)Georgia Institute of Technology, Atlanta, United States, (2)University of California Santa Barbara, Department of Earth Science, Santa Barbara, CA, United States, (3)Observatorio Vulcanológico y Sismológico de Costa Rica, Heredia, Costa Rica
 
The state of stress in the forearc mantle wedge corner and the overriding crust (1932658)
Viven Sharma, University of Minnesota Twin Cities, Earth and Environmental Sciences, Minneapolis, MN, United States and Ikuko Wada, Department of Earth Sciences, Minneapolis, United States
 
The 2024 M7.1 Earthquake in the Nankai Trough Induced by Ridge Subduction (1933024)
Wangwang Gu1, Zhe Jia2, Risheng Chu1, Sidao Ni1 and Minhan Sheng3, (1)Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China, (2)University of Texas at Austin, Austin, United States, (3)Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China, Wuhan, China
 
Rheological Properties of the Southern Sumatra Subduction Zone Inferred from the 2007 Mw8.4 Bengkulu Earthquake (1934736)
Siyuan Yang1, Yan Hu2,3 and Jian Lin1,4, (1)Southern University of Science and Technology, Shenzhen, China, (2)University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China, (3)Deep Space Exploration Laboratory, Institute of Deep Space Sciences, Hefei, China, (4)South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
 
Locked but not Loaded? A Global Analysis of Megathrust Coupling and Earthquake Slip (1940266)
Bar Oryan, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States and Alice-Agnes Gabriel, University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States
 
How Seamounts Subduct And Affect Seismicity (1946181)
Maaike Fonteijn1,2, Ylona van Dinther2 and Elenora van Rijsingen2, (1)Université Grenoble Alpes, ISTerre, Grenoble, France, (2)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
 
Reconstructing spatial and temporal rupture history using stratigraphy and microfossils at Sitkinak Island, AK (1948717)
Tabitha Nowak1, Tina Dura1, Simon Engelhart2, Richard W Briggs3, Robert Carleton Witter4, Rich David Koehler5 and Peter J Haeussler6, (1)Virginia Polytechnic Institute and State University, Geosciences, Blacksburg, United States, (2)University of Durham, Department of Geography, Durham, United Kingdom, (3)USGS Geologic Hazards Science Center, Golden, United States, (4)USGS Alaska Science Center, Anchorage, AK, United States, (5)University of Nevada Reno, Reno, NV, United States, (6)U.S. Geological Survey, Anchorage, United States
 
Observed Variations in Coseismic Subsidence Across Multiple Cascadia Megathrust Earthquakes (1949727)
David Bruce1, Tina Dura1, Robert Carleton Witter2, Harvey M Kelsey3 and Eileen Hemphill-Haley4, (1)Virginia Polytechnic Institute and State University, Geosciences, Blacksburg, United States, (2)USGS Alaska Science Center, Anchorage, AK, United States, (3)Humboldt State University, Arcata, United States, (4)Hemphill-Haley Consulting, Eugene, United States
 
Reexamining Slip Estimates Throughout the Earthquake Cycle at Nankai Using 3D Heterogeneous Viscoelastic Models (1951441)
Elizabeth M Sherrill, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Kaj M Johnson, Indiana University, Department of Earth and Atmospheric Sciences, Bloomington, United States
 
Using Episodic Tremor and Slip to Characterize Segmentation Boundaries in Northern Cascadia (1963279)
Alaura Custard, University of Kansas, Geology, Lawrence, KS, United States and Noel Jackson (Bartlow), University of Kansas, Lawrence, United States
 
The Distribution of Fault Locking on the Kamchatka Subduction Zone and Its Relationship to the 2025 M8.8 Earthquake (1968019)
Axel Periollat and Gareth Funning, University of California Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States
 
Improving geodetic constraints on subduction zone coupling using accurate physics-based models with variable elastic properties (1972371)
Jeng Hann Chong, University of New Mexico Main Campus, Albuquerque, NM, United States and Eric Ostrom Lindsey, University of New Mexico, Albuquerque, United States
 
Large Earthquakes along Subducting Plates: A Geodynamics Study of Elastic Energy Storage in 3D Subduction Systems (1992514)
Lior Suchoy, Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom, Saskia D B Goes, Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, Fabio A Capitanio, Monash University, School of Earth, Atmosphere and Environment, Melbourne, VIC, Australia and Louis Moresi, Australian National University, Research School of Earth Sciences, Canberra, Australia
 
Investigating evidence of precursors of recent great subduction earthquakes from satellite gravity observations (1994142)
Lei Wang1, Dhamsith Weerasinghe1, Roland Bürgmann2 and Shahad Alojaiman1, (1)Ohio State University Main Campus, Department of Civil, Environmental and Geodetic Engineering, Columbus, United States, (2)University of California Berkeley, Earth and Planetary Science, Berkeley, United States
 
Integrating Structural Geology, Advanced Meshing, and Underworld3 for Realistic Fault Modeling in Geodynamics and Resource Exploration (1997272)
Thyagarajulu Gollapalli, Monash University, Melbourne, VIC, Australia, Louis Moresi, Australian National University, Research School of Earth Sciences, Canberra, Australia, Juan Carlos Graciosa, Australian National University, Canberra, Australia and Louis Moresi
 
Non-stationary Asperities and Megathrust Earthquake Potential (2001118)
Kaj M Johnson1, Mr. Durga Acharya2, Elizabeth Sherrill3, Nicolás Castro Perdomo1 and Laura M Wallace3,4, (1)Indiana University Bloomington, Department of Earth and Atmospheric Sciences, Bloomington, IN, United States, (2)Indiana University Bloomington, Bloomington, IN, United States, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (4)University of Texas at Austin, Institute for Geophysics, Austin, United States
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