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Session Proposal: The SZ4D Experiment: Comparing Subduction Zone Processes Across Three Margins (AGU25)

T023
The SZ4D Experiment: Comparing Subduction Zone Processes Across Three Margins

Session ID#: 252202

Session Description:
Understanding  the processes controlling landslides, earthquakes, volcanic eruptions and tsunamis requires utilizing natural experiments to identify and isolate controlling factors. How do climate and tectonics interact to determine the susceptibility to landslides? What is the relative importance of magma supply and crustal faulting in controlling eruptive frequency? Are the size and location of earthquakes affected by structural boundaries? These and other geohazard questions can be addressed by studying behaviors across subduction zones.  We invite contributions that use the power of comparison across multiple subduction zones to develop new insights. Observational, theoretical and laboratory studies comparing the SZ4D focus areas of Cascadia, Alaska and Chile are particularly welcome.
Co-Sponsor(s):
  • EP - Earth and Planetary Surface Processes
  • NH - Natural Hazards
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

7223 Earthquake interaction, forecasting, and prediction [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]
8175 Tectonics and landscape evolution [TECTONOPHYSICS]
8185 Volcanic arcs [TECTONOPHYSICS]
Primary Convener:  Emily E Brodsky, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States
Conveners:  Cristian A. Farias, Universidad Católica de Temuco, Departamento de Obras Civiles y Geología, Temuco, Chile, Demian M. Saffer, Pennsylvania State University, University Park, United States and Alice-Agnes Gabriel, Ludwig-Maximilians-Universität München, Department of Earth and Environmental Sciences, Munich, Germany
 
Rayleigh and Shear Wave Imaging of the Alaskan Subduction Margin (1873463)
Aubreya Nicole Adams1, Cristo Ramirez1,2 and Jessica Wen1,3, (1)Colgate University, Department of Earth and Environmental Geosciences, Hamilton, United States, (2)California State University Northridge, Geological Science, Northridge, CA, United States, (3)Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States
 
Global Trench-Parallel Inner Forearc Deformation Dictated by Subduction Zone Obliquity (Invited) (1886295)
Kristin D Morell, University of California Santa Barbara, Department of Earth Science, Santa Barbara, CA, United States, Kellan Gilroy, University of California Santa Barbara, Santa Barbara, United States, Theron Finley, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada and Nicolas Harrichhausen, McGill University, Earth and Planetary Sciences, Montreal, QC, Canada
 
Earthquake stress drops in the Alaska, north-central Chile, and Tonga subduction zones (1888935)
Songqiao Shawn Wei, Michigan State University, Department of Computational Mathematics, Science and Engineering, East Lansing, MI, United States, Yurong Zhang, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States and Dongdong Tian, China University of Geosciences, Wuhan, China
 
Fault Failure Mechanisms and Slip Modes Along the Shallow Subduction Interface: Insights from an Exhumed Accretionary Complex in Alaska (1910476)
Whitney M Behr1, Markus Rast1, Claudio Madonna1 and Simon Guérin-Marthe2, (1)Structural Geology & Tectonics Group, Dept. of Earth & Planetary Sciences, ETH Zürich, Zürich, Switzerland, (2)Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
 
Comparing seismic attenuation structures of the Tonga and north-central Chile subduction zones (1919195)
Yurong Zhang, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States and Songqiao Shawn Wei, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States
 
Near-surface processes during and after laccolith emplacement and volcanic eruption at Cordon Caulle, Chile - The CHILCO project (Invited) (1922681)
Philipp Ruprecht1, Alvaro Amigo2, Felipe Aron3, Joseph Biasi4, Carlos Cardona Sr.5, Loreto Córdova6, Francisco Delgado3, Thomas Giachetti7, Helge Martin Gonnermann8, Christopher B Kratt9, Carolina Munoz-Saez10, Alida Perez-Fodich11, Matthew E Pritchard12, Pablo Sanchez-Alfaro13, Joel S Scheingross1 and CHILCO Team, (1)University of Nevada Reno, Nevada Geosciences, Reno, United States, (2)Servicio Nacional de Geologia y Mineria - SERNAGEOMIN, Red Nacional de Vigilancia Volcanica, Talca, Chile, (3)University of Chile, Departamento de Geología, Santiago, Chile, (4)University of Wyoming, Laramie, United States, (5)Observatorio Volcanológico de los Andes del Sur (OVDAS), SERNAGEOMIN, Temuco, Chile, (6)Observatorio Volcanológico de los Andes del Sur (OVDAS), Servicio Nacional de Geología y Minería (SERNAGEOMIN), Temuco, Chile, (7)University of Oregon, Eugene, United States, (8)Rice University, Houston, TX, United States, (9)University of Nevada Reno, Center for Transformative Environmental Monitoring Programs (CTEMPs), Reno, United States, (10)Cornell University, Earth and Atmospheric Sciences, Ithaca, United States, (11)University of Chile, Department of Geology, Santiago, Chile, (12)Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, (13)Austral University of Chile, Instituto de Ciencias de la Tierra, Valdivia, Chile
 
Seismic Tomography of the Alaska Subduction Zone Using Distributed Acoustic Sensing (DAS) (1924038)
Anjani Mirchandani, University of Washington Seattle, Sunnyvale, California, UNITED STATES, Ettore Biondi, Stanford University, Geophysics, Stanford, CA, United States, Marine Denolle, University of Washington Seattle Campus, Department of Earth and Space Sciences, Seattle, United States, Eva Marie Golos, University of Wisconsin Madison, Geoscience, Madison, United States, William S D Wilcock, University of Washington Seattle Campus, School of Oceanography, Seattle, United States, Bradley Paul Lipovsky, University of Washington, Department of Earth and Space Sciences, Seattle, United States and Alex Rose, University of Washington, Seattle, Seattle, United States
 
Earthquake Source Characterization Using DAS at Cook Inlet, Alaska (1928908)
Veronica Gaete-Elgueta1, Bradley Paul Lipovsky1 and German A Prieto2, (1)University of Washington, Department of Earth and Space Sciences, Seattle, United States, (2)Universidad Nacional de Colombia, Bogota, Colombia
 
Precursory Patterns Prior to the July 2020 Mw 7.8 Simeonof, Alaska Earthquake Revealed in an Enhanced Microseismicity Catalog (1932312)
Coralis Del Mar Friedman Alvarez, Grace Barcheck, Sarah Nolan and Geoffrey A Abers, Cornell University, Earth and Atmospheric Sciences, Ithaca, United States
 
The 2020-2025 Alaska Peninsula Earthquake Sequence and Implications for Megathrust Slip Budget and the Earthquake Cycle (Invited) (1932883)
Jeffrey Todd Freymueller1, Julie Elliott1, Ronni Grapenthin2, Yaqi Jie3, Revathy Mozhikunnath Parameswaran4, Songqiao Shawn Wei5, Zhuohui Xiao6 and Zechao Zhuo1, (1)Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, (2)University of California Berkeley, Berkeley, United States, (3)Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States, (4)Indian Institute of Science, Centre for Earth Sciences, Bangalore, India, (5)Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, (6)School of Geodesy and Geomatics, Wuhan University, Wuhan, China
 
Bayesian Joint Inversion of Coseismic Slip and Afterslip for the 2020 Mw 7.8 Simeonof Earthquake (1934799)
Zechao Zhuo1, Jeffrey Todd Freymueller1, Junichi Fukuda2, Zhuohui Xiao3, Julie Elliott1 and Ronni Grapenthin4, (1)Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, (2)University of Tokyo, Earthquake Research Institute, Bunkyo-ku, Japan, (3)School of Geodesy and Geomatics, Wuhan University, Wuhan, China, (4)University of California Berkeley, Berkeley, United States
 
Improved Slab Imaging in the Alaskan Peninsula Through Converted Wave Detection (1954906)
Andrew Birkey, Mississippi State University, Mississippi State, MS, United States, Songqiao Shawn Wei, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, Kiara A Daly, University of Hawaii Hilo, Hilo, United States and Geoffrey A Abers, Cornell University, Earth and Atmospheric Sciences, Ithaca, United States
 
Why do foreshocks occur where they do? (1959827)
Emily E Brodsky1, José Tomás De La Peña2, Andrei Maksymowicz3, Leoncio Cabrera4,5, Daniel Ceroni2, Javier Ojeda6,7, Bertrand Potin8, Sergio Leon-Rios9, Travis Alongi10 and Sergio Ruiz11, (1)University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States, (2)Universidad de Chile, Geophysical Department, Santiago, Chile, (3)University of Chile, DGF - FCFM, Santiago, Chile, (4)University of Chile, Department of Geophysics, Santiago, Chile, (5)Pontificia Universidad Católica de Chile, Departmento de Ingeniéria Estructural y Geotécnica, Washington, United States, (6)Universidad de Chile, Santiago, Chile, (7)Universidad de Concepción, Concepción, Chile, (8)University of Chile, Geophysics, Santiago, Chile, (9)AMTC-FCFM, Universidad de Chile, Santiago, Chile, (10)U.S. Geological Survey, Earthquake Science Center, Moffett Field, United States, (11)Universidad de Chile, Departamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Santiago, Chile
 
Structure of the megathrust: amphibious imaging the Kodiak segment of the M9.2 1964 rupture zone (1961474)
Geoffrey A Abers1, Kiara A Daly2, Sarah Nolan1 and Michael Everett Mann3, (1)Cornell University, Earth and Atmospheric Sciences, Ithaca, United States, (2)Cornell University, Ithaca, United States, (3)Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States
 
Shallow Aftershocks Beyond the Updip Coseismic Slip Limit Revealed by a Machine Learning Catalog from RAPID Response and Permanent Seismic Stations (1963999)
Hanqi Zhu1, Grace Barcheck1, Geoffrey A Abers1 and Jeffrey Todd Freymueller2, (1)Cornell University, Earth and Atmospheric Sciences, Ithaca, United States, (2)Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States
 
Erosion dynamics and sediment distribution on the Mataquito River, Chile (1972939)
Grant Long, Stanford University, Earth and Planetary Sciences, Stanford, CA, United States, Felipe Aron, University of Chile, Departamento de Geología, Santiago, Chile and George E Hilley, Stanford University, Earth and Planetary Sciences, Stanford, United States
 
Offshore Observations Improve Earthquake Locations and Reveal Seismicity Near the Megathrust in the Alaska-Aleutian Subduction Zone (1976144)
Sarah Nolan1, Geoffrey A Abers2, Grace Barcheck2, Steven W Roecker3, Douglas Wiens4, Emily C Roland5 and Patrick Matulka6, (1)Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, (2)Cornell University, Earth and Atmospheric Sciences, Ithaca, United States, (3)Rensselaer Polytechnic Inst, Earth & Environmental Sciences, Troy, United States, (4)Washington University in St. Louis, Department of Earth, Environmental, and Planetary Science, St. Louis, United States, (5)Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, (6)Washington University in St. Louis, St. Louis, MO, United States
 
Active Coastal Uplift in South-Central Chile Imaged by Erosion Rates and River Profiles in the Rapel River Watershed (1980627)
George E Hilley, Stanford University, Earth and Planetary Sciences, Stanford, United States, Grant Long, Stanford University, Earth and Planetary Sciences, Stanford, CA, United States and Felipe Aron, University of Chile, Departamento de Geología, Santiago, Chile
 
Late Triggered Megathrust slip following the 2020 Mw7.6 Sand Point Alaska Strike-Slip Earthquake Could Explain its Tsunami (1987426)
Ronni Grapenthin1, Revathy Mozhikunnath Parameswaran2, Zhuohui Xiao3, Dmitry Nicolsky4, Songqiao Shawn Wei5, Julie Elliott6, Jeffrey Todd Freymueller6, Geoffrey A Abers7 and Hanqi Zhu7, (1)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (2)Indian Institute of Science, Centre for Earth Sciences, Bangalore, India, (3)School of Geodesy and Geomatics, Wuhan University, Wuhan, China, (4)University of Alaska Fairbanks, Geophysical Institute Permafrost Laboratory, Fairbanks, AK, United States, (5)Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, (6)Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, (7)Cornell University, Earth and Atmospheric Sciences, Ithaca, United States
 
Imaging the Alaskan Subduction Zone Using Love Wave Phase Velocity Tomography (1999434)
Cristo Ramirez1, Aubreya Nicole Adams2 and Jessica Wen2,3, (1)California State University Northridge, Geological Science, Northridge, CA, United States, (2)Colgate University, Department of Earth and Environmental Geosciences, Hamilton, United States, (3)Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States
 
3D Modeling of Slab-edge Driven Mantle Flow in the Cascadia Subduction Zone (2002957)
Clayton Kolke1, Margarete Ann Jadamec2 and Matthew Knepley1, (1)University at Buffalo, Buffalo, NY, United States, (2)University at Buffalo, Department of Geology; Institute for Artificial Intelligence and Data Science, Buffalo, NY, United States
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