T31C:
The Mechanism of Tectonic Tremor II Posters


Session ID#: 10772

Session Description:
Low and very low frequency earthquakes detected within tectonic tremor bursts suggest brittle shear failure occurs at the source of tremor. Tremor occurs on subduction and transform plate boundaries and at a variety of depths. Grain scale deformation mechanisms may vary at these different locations, yet tremor is observed to have similar seismological characteristics. The physical conditions and processes that drive transitional behavior in mixed rheology deformation may be key to understanding whether there are common mechanisms at the source of tremor. In this session, we hope to include seismological observations, geological constraints, and insights from modeling and experiments to encourage an extensive review of tremor source processes. We also invite studies of microseismicity, repeating earthquakes and other phenomena in transitional fault regions that may shed light on the mechanisms of tremors and their implications for earthquake nucleation processes.
Primary Convener:  James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada
Conveners:  Whitney M Behr, Structural Geology and Tectonics Group, Geological Institute, ETH Zurich, Zurich, Switzerland, Zurich, Switzerland, David R Shelly, USGS National Earthquake Information Center, Golden, United States and Jean Paul Ampuero, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States
Chairs:  James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada, Whitney M Behr, Structural Geology and Tectonics Group, Geological Institute, ETH Zurich, Zurich, Switzerland, Zurich, Switzerland, David R Shelly, U.S. Geological Survey, Geologic Hazards Science Center, Golden, CO, United States and Jean Paul Ampuero, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States
OSPA Liaison:  James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada

Cross-Listed:
  • MR - Mineral and Rock Physics
  • S - Seismology
Index Terms:

7230 Seismicity and tectonics [SEISMOLOGY]
8034 Rheology and friction of fault zones [STRUCTURAL GEOLOGY]
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
8150 Plate boundary: general [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Imaging the Subduction Plate Interface Using Low-Frequency Earthquakes (63310)
Alexandre P Plourde, Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada and Michael G Bostock, University of British Columbia, Vancouver, BC, Canada
Study of the Triggering Level of Dynamic Stress Induces Non-Volcanic Tremor in Longitudinal Valley in Eastern Taiwan (64286)
Wen-Yen Chang, National Applied Research Laboratories, Taipei, Taiwan, Wei-Fang Sun, National Dong Hwa University, Department of Natural Resources and Environmental Studies, Hualien County, Taiwan and Hsin-Yuan Chen, National Dong Hwa University, Hualien County, Taiwan
Fluid-Assisted Shear Failure Within a Ductile Shear Zone (68676)
James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada, Katharine Compton, Colorado State University, Fort Collins, CO, United States and Gregory J. Holk, California State University Long Beach, Long Beach, CA, United States
Tremor Hypocenters Form a Narrow Zone at the Plate Interface in Two Areas of SW Japan (69745)
John G Armbruster, Columbia University of New York, Palisades, NY, United States
Imaging Low-Frequency Earthquakes with Geometric-Mean Reverse Time Migration (67607)
Nori Nakata, Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, United States, Gregory C Beroza, Stanford University, Department of Geophysics, Stanford, CA, United States and Victor M Cruz-Atienza, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
Near-field Observations of Very-low-frequency Earthquakes on the San Andreas Fault (79524)
Andres Felipe Felipe Peña Castro, McGill University, Montreal, QC, Canada, Rebecca M Harrington, Ruhr University Bochum, Institute of Geology, Mineralogy and Geophysics, Bochum, Germany and Elizabeth S Cochran, Organization Not Listed, Washington, DC, United States
Evidence of Shear Failure at the Subduction Interface by VLF Earthquake Characterization in Guerrero, Mexico (71491)
Julie Maury1, Satoshi Ide2, Victor M Cruz-Atienza3, Vladimir Kostoglodov4 and Xyoli Perez-Campos4, (1)University of Tokyo, Bunkyo-ku, Japan, (2)The University of Tokyo, Department of Earth and Planetary Science, Bunkyo-ku, Japan, (3)Universidad Nacional Autonoma de Mexico, Mexico City, Mexico, (4)UNAM National Autonomous University of Mexico, Mexico City, Mexico
Time-frequency scale decomposition of tectonic tremor signals for space-time reconstruction of tectonic tremor sources (72123)
Natalia Poiata1, Claudio Satriano2, Jean-Pierre Vilotte1, Pascal Bernard3 and Kazushige Obara4, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Université Paris Cité, Institut de physique du globe de Paris, Sismologie, Paris, France, (3)Institut de Physique du Globe de Paris (IPGP), Université Paris Cité, Paris, France, (4)The University of Tokyo, Earthquake Research Institute, Tokyo, Japan
Dip-dependent variations in LFE duration during ETS events (73592)
Shelley Chestler1, Kenneth Creager1 and Abhijit Ghosh2, (1)Univ Washington, Seattle, WA, United States, (2)University of California Riverside, Riverside, CA, United States
Identifying spatiotemporal migration patterns of non-volcanic tremors using hidden Markov models (76606)
Jiancang Zhuang, Institute of Statistical Mathematics, Tokyo, Japan, Ting Wang, University of Otago, Dunedin, New Zealand, Kazushige Obara, The University of Tokyo, Earthquake Research Institute, Tokyo, Japan and Hiroshi Tsuruoka, University of Tokyo, Bunkyo-ku, Japan

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