T12B:
Subduction Dynamics Across the Scales

Submit an Abstract to this Session



Session ID#: 31172

Session Description:
Subduction zones display a wide variety of tectonic and earthquake behaviors across a range of timescales. Seismic tomography, laboratory and numerical models have helped to understand plate boundary evolution at the geological time-scale. However many aspects of short-term subduction dynamics remain unclear. The series of thrust megathrust earthquakes of the last 15 years, besides highlighting the social relevance of geodynamic studies, has opened a window into the dynamics of subduction zones at the seismic cycle time-scale. The combination of seismic, geodetic and numerical modeling has helped to understand the physical characteristics of the megathrust earthquakes and the role of the fault geometry, temperature, fluid circulation, petrology and seismic/aseismic energy partitioning to the dynamics convergent margins. We welcome contributions from geodynamicists, seismologists, geodesists and geologists aiming at exploring the relationship between subduction zone dynamics and seismic cycle.
Primary Convener:  Gabriele Morra, University of Louisiana at Lafayette, Lafayette, LA, United States
Conveners:  Emma Hill, Asian School of the Environment, Nanyang Technological University, Singapore, Singapore, Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Ylona van Dinther, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Chairs:  Emma Hill, Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore, Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Gabriele Morra, University of Louisiana at Lafayette, Lafayette, LA, United States
OSPA Liaison:  Gabriele Morra, University of Louisiana at Lafayette, Lafayette, LA, United States

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • G - Geodesy
  • S - Seismology
Index Terms:

1242 Seismic cycle related deformations [GEODESY AND GRAVITY]
7215 Earthquake source observations [SEISMOLOGY]
8123 Dynamics: seismotectonics [TECTONOPHYSICS]
8180 Tomography [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Seismic and Aseismic Slip on Mature and Evolving Faults Simulated with Rate-and-State Friction in a Continuum. (285233)
Robert Herrendoerfer, ETH Zurich, Zurich, Switzerland, Ylona van Dinther, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands and Taras Gerya, ETH Zurich, Department of Earth and Planetary Sciences, Zurich, Switzerland
Observing and modeling the spectrum of a slow slip event: Constraints on the scaling of slow slip and tremor (228384)
Jessica C Hawthorne, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, Noel M Jackson, University of Missouri, Geological Sciences, Columbia, MO, United States and Abhijit Ghosh, University of California Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States
Spatiotemporal variations of the frequency-magnitude distribution before and after the 2011 Tohoku earthquake in the Japan Trench subduction zone (273797)
Yukihiro Nakatani1, Kimihiro Mochizuki1, Masanao Shinohara2, Tomoaki Yamada3, Hajime Shiobara1, Ryota Hino4, Yoshihiro Ito5, Yoshio Murai6, Toshinori Sato7, Kenji Uehira8, Hiroshi Yakiwara9, Shuichi Kodaira10 and Hiroaki Tsushima11, (1)Earthquake Research Institute, The University of Tokyo, Tokyo, Japan, (2)National Research Institute for Earth Science and Disaster Resilience/Earthquake Research Institute, The University of Tokyo, Tokyo, Japan, (3)ERI, Tokyo, Japan, (4)Tohoku University, Graduate School of Science, Sendai, Japan, (5)Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan, (6)Hokkaido University, Institute of Seismology and Volcanology, Faculty of Science, Sapporo, Japan, (7)Chiba University, Chiba, Japan, (8)NIED, Tsukuba, Ibaraki, Japan, (9)Kagoshima University, Kagoshima, Japan, (10)JAMSTEC, Yokohama, Japan, (11)MRI, JMA, Tsukuba, Japan
The Effect of Semi-Brittle Rheology on the Seismicity at the Subduction Interface: Coseismic and Aseismic Events (235463)
Xinyue Tong, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Luc Lavier, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
Length Scales and Types of Heterogeneities Along the Deep Subduction Interface: Insights From an Exhumed Subduction Complex on Syros Island, Greece (234105)
Alissa Kotowski1, Whitney M Behr2, Xinyue Tong3 and Luc Lavier3, (1)University of Texas at Austin, Austin, TX, United States, (2)Structural Geology & Tectonics Group, Dept. of Earth & Planetary Sciences, ETH Zürich, Zürich, Switzerland, (3)University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
Deep Interseismic Deformation Within the Northern Japan Subduction Zone (287159)
Kaj M Johnson, Indiana University Bloomington, Department of Earth and Atmospheric Sciences, Bloomington, IN, United States
Mechanical stratification during extreme sediment accretion in the Indo-Burman Ranges: geological and theoretical constraints on the megathrust geometry (298424)
Paul M Betka, Lamont -Doherty Earth Observatory, Palisades, United States, Leonardo Seeber, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, United States, W Roger Buck, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Michael S Steckler, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, Ryan Sincavage, Radford University, Department of Geospatial and Earth Sciences, Radford, United States, C. Zoramthara, Government Zirtiri Residential Science College, Geology, Aizawl, India and Stuart N Thomson, University of Arizona, Department of Geosciences, Tucson, AZ, United States

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