T52C:
Shallow Subduction Zone Structure and Dynamics II


Submit an Abstract to this Session


Session ID#: 56937

Session Description:
Subduction zones play a key role in transporting and recycling earth material, as well as in initiating earthquakes and causing tsunami, and volcanic hazards. Recent investigations on the incoming plate, shallow subduction zone, and megathrust using near-field observations, core-samples, and high-resolution images have led to new insights into subduction zone dynamics. In this session we solicit contributions on all studies relevant to subduction zone dynamics from seismology, geodesy, geochemistry, numerical modeling, and seafloor sampling and drilling. Topics include but are not limited to, rupture processes and cycles of megathrust earthquakes, compositional variations of incoming plates, structure heterogeneities from the outrise to back arc, relationship between outer-rise and megathrust earthquakes, thermal and hydro-mechanical properties of the oceanic and overriding plates, and controlling factors of tectonic forces acting on the megathrust.
Primary Convener:  Hongfeng Yang, Chinese University of Hong Kong, Hong Kong, Hong Kong
Conveners:  Douglas Wiens, Washington University in St. Louis, Department of Earth, Environmental, and Planetary Science, St. Louis, United States, Shuichi Kodaira, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan and Yan Hu, University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China
Primary Liaison:  Hongfeng Yang, Chinese University of Hong Kong, Hong Kong, Hong Kong
Chairs:  Yan Hu, University of California Berkeley, Berkeley Seismological Laboratory, Berkeley, United States and Shuichi Kodaira, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
OSPA Liaison:  Yan Hu, University of California Berkeley, Berkeley Seismological Laboratory, Berkeley, United States
Co-Organized with:
Tectonophysics, and Seismology

Cross-Listed:
  • G - Geodesy
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:
  • G - Geodesy
  • S - Seismology
Index Terms:

1242 Seismic cycle related deformations [GEODESY AND GRAVITY]
7240 Subduction zones [SEISMOLOGY]
8123 Dynamics: seismotectonics [TECTONOPHYSICS]
8170 Subduction zone processes [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Constraining the Dip of Shallowly-Dipping Thrust Events Using Long-period Love Wave Radiation Patterns: Applications to the 4 May 2018 Hawaii Island and 25 October 2010 Mentawai Earthquakes (369816)
Thorne Lay, University of California Santa Cruz, Santa Cruz, United States, Lingling Ye, University of Tokyo, Earthquake Research Institute, Tokyo, Japan, Hiroo Kanamori, California Institute of Technology, Seismological Laboratory, Division of Geological and Planetary Sciences, Pasadena, CA, United States and Kenji Satake, Earthquake Research Institute, The University of Tokyo, Tokyo, Japan
Characteristics of Japan Trench shallow megathrust revealed by deep-sea researches (371888)
Ryota Hino, Tohoku University, Graduate School of Science, Sendai, Japan, Shuichi Kodaira, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan, Toshiya Kanamatsu, Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamics, Kanagawa, Japan, Masanao Shinohara, Univ Tokyo, Tokyo, Japan and Yoshihiro Ito, Kyoto University, Disaster Prevention Research Institute, Kyoto, Japan
The dynamics of shallow plate interface slip at the offshore Hikurangi subduction margin, New Zealand (Invited) (344568)
Laura M Wallace1,2, Philip Barnes3, Demian M Saffer4, Stuart A Henrys1, Daniel H N Barker1, Dan Bassett1, Fabio Caratori Tontini5, Yoshihiro Kaneko6, Yoshihiro Ito7, Kimihiro Mochizuki8, Spahr C Webb9, Kathryn Clark1, Ursula Alyson Cochran1, Nicola J Litchfield1, Charles A Williams Jr1, Susan M Ellis1, Bill Fry1, Erin Todd10, Rebecca E Bell11, Katerina E Petronotis12, Ingo Andreas Pecher13, Leah LeVay14 and IODP Expedition 372 and 375 Scientists, (1)GNS Science, Lower Hutt, New Zealand, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (3)National Institute of Water & Atmospheric Research, Wellington, New Zealand, (4)Pennsylvania State University, University Park, United States, (5)University of Genoa, Genoa, Italy, (6)Kyoto University, Department of Geophysics, Kyoto, Japan, (7)Kyoto University, Disaster Prevention Research Institute, Kyoto, Japan, (8)University of Tokyo, Earthquake Research Institute, Bunkyo-ku, Japan, (9)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (10)University of Otago, Dunedin, New Zealand, (11)Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, (12)Texas A&M University, International Ocean Discovery Program, College Station, United States, (13)University of Auckland, Auckland, New Zealand, (14)Texas A&M University, International Ocean Discovery Program, College Station, TX, United States
Rupture to the trench? Frictional properties of incoming sediments at the Cascadia subduction zone (370872)
Caroline Seyler, University of Texas, Austin, Institute for Geophysics, Austin, United States, James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, Canada, Takehiro Hirose, JAMSTEC, Kochi Institute for Core Sample Research, Nankoku, Japan and Heather M Savage, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States
The impact of shallow rheological transition along the subduction plate interface on tremor and earthquake nucleation (428955)
Paola Vannucchi, University of Florence, Earth Sciences, Florence, Italy, Alexander Peter Clarke, Royal Holloway University of London, Egham, TW20, United Kingdom, Jason Phipps Morgan, Royal Holloway University of London, Egham, United Kingdom and Audrey Ougier-Simonin, British Geological Survey Keyworth, Nottinghamshire, NG12, United Kingdom
Quantifying seismic hazard from interseismic locking distribution along the subduction megathrust (429341)
Hongfeng Yang1, Suli Yao2, Bing He2 and Andrew Vern Newman3, (1)Chinese University of Hong Kong, Hong Kong, Hong Kong, (2)Chinese University of Hong Kong, Earth System Science Programme, Hong Kong, Hong Kong, (3)Georgia Institute of Technology, Atlanta, United States
Using coupled models of the 2004 Sumatra-Andaman earthquake and Indian Ocean tsunami to examine the impact of fluid pressure and megathrust geometry (431057)
Elizabeth Madden1, Stefan Vater2, Thomas Ulrich3, Leonhard Rannabauer4 and Alice-Agnes Gabriel3, (1)Ludwig Maximilians University of Munich, Department of Earth and Environmental Sciences, Munich, Germany, (2)University of Hamburg, Hamburg, Germany, (3)Ludwig-Maximilians-Universität München, Department of Earth and Environmental Sciences, Munich, Germany, (4)Technical University of Munich (TUM), Munich, Germany
Three-dimensional finite element model of the viscoelastic postseismic deformation of the 1964 Mw9.2 Alaska earthquake (391059)
Kejing Huang1, Yan Hu1 and Jeffrey Todd Freymueller2,3, (1)University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China, (2)Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, (3)Michigan State University, East Lansing, MI, United States

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