T11E:
Subduction Dynamics Across the Scales

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Session ID#: 31166

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:  Gabriele Morra, University of Louisiana at Lafayette, Lafayette, LA, United States, Emma Hill, Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, 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:

Earthquakes Below the Brittle-Ductile Transition: The Role of Grain Size Assisted Thermal Runaway (Invited) (230035)
Marcel Thielmann, Universität Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany and Thibault Duretz, Université de Rennes, Géosciences Rennes, Rennes, France; University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland
Structural control of the upper plate on the down-dip segmentation of subduction dynamics (301498)
Sylvain Barbot, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, Qibin Shi, Nanyang Technological University, Asian School of the Environment, Singapore, Singapore; Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore, Shun-ichiro Karato, Yale University, Earth and Planetary Sciences, New Haven, CT, United States, Bunichiro Shibazaki, Building Research Institute, Ibaraki, Japan, Takanori Matsuzawa, International Institute of Seismology and Earthquake Engineering,Building Research Institute, Ibaraki, Japan and Paul Tapponnier, Earth Observatory of Singapore, Singapore, Singapore
How long-term dynamics of sediment subduction controls short-term dynamics of seismicity (251235)
Silvia Brizzi1, Iris van Zelst2, Ylona van Dinther3, Francesca Funiciello4 and Fabio Corbi1,5, (1)Università Roma Tre, Dip. Scienze, Roma, Italy, (2)ETH Swiss Federal Institute of Technology Zurich, Department of Earth Sciences, Zurich, Switzerland, (3)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands, (4)University Roma Tre, Science, Rome, Italy, (5)Géosciences Montpellier, Montpellier, France
What controls intermediate depth seismicity in subduction zones? (299219)
Manuel Alberto Florez, Massachusetts Institute of Technology, Cambridge, MA, United States and German A Prieto, Universidad Nacional de Colombia, Bogota, Colombia
Inverse models of plate coupling and mantle rheology: Towards a direct link between large-scale mantle flow and mega thrust earthquakes (230272)
Michael Gurnis1, Vishagan Ratnaswamy2, Georg Stadler3, Johann Rudi4, Xi Liu1 and Omar Ghattas5, (1)California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, (2)Sandia National Laboratories, Livermore, CA, United States, (3)New York University, Courant Institute of Mathematical Sciences, New York, NY, United States, (4)ICES, University of Texas at Austin, Austin, TX, United States, (5)The University of Texas at Austin, ICES, Austin, TX, United States
Segmentation and supercycles: A catalog of earthquake cycle complexities from the Sumatran Sunda Megathrust and other well-studied faults worldwide (Invited) (218812)
Belle Philibosian, U.S. Geological Survey, Earthquake Science Center, Menlo Park, CA, United States, Aron J Meltzner, Nanyang Technological University, Earth Observatory of Singapore, Singapore, Singapore and Kerry Sieh, EOS, Nanyang Technological Univ., Singapore, Singapore
Geoid anomalies at subduction zones due to the seismic cycle (271677)
Gabriele Cambiotti, University of Milan - Bicocca, Milan, Italy, Roberto Sabadini, Univ Milano, Milano, Italy and David A Yuen, Department of Earth Sciences, Minnesota Supercomputing Institute, University of Minnesota Twin Cities, Earth Sciences, Minneapolis, MN, United States
What can we learn about stress changes in subduction zones from geodesy? (252325)
William D Barnhart and Bryan Stressler, University of Iowa, Iowa City, IA, United States

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