G23C:
Plate Motion, Continental Deformation, and Interseismic Strain Accumulation II


Session ID#: 7412

Session Description:
Space geodetic positioning data and geologic observations are being jointly analyzed to evaluate how plate motion is being taken up by continental deformation and how elastic strain accumulates in the time between earthquakes.  We invite geodetic (GNSS, InSAR, VLBI, SLR, DORIS, and historical measurements) and geologic and geophysical studies (paleoseismologic fault slip rates, seismicity, and marine magnetic anomalies) that further constrain the character of plate boundary zone deformation and interseismic strain accumulation.  Can elastic strain buildup be readily related to future great earthquakes?  What fraction of plate motion is taken up by fault slip during earthquakes, and what fraction becomes part of distributed deformation off of the major faults?  How does fault slip inferred from paleoseismology add up to present-day plate motion?  How fast are mountains currently rising?  To what degree do postseismic transients perturb the nearly constant velocity of the plates and influence the definition of Earth's reference frame?
Primary Convener:  Donald F Argus, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Conveners:  Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States and Rui Manuel Silva Fernandes, University of Beira Interior, Covilha, Portugal
Chairs:  Donald F Argus, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States and Rui Manuel Silva Fernandes, University of Beira Interior, Covilha, Portugal
OSPA Liaison:  Donald F Argus, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States

Cross-Listed:
  • NH - Natural Hazards
  • S - Seismology
  • T - Tectonophysics
Index Terms:

1240 Satellite geodesy: results [GEODESY AND GRAVITY]
1525 Paleomagnetism applied to tectonics: regional, global [GEOMAGNETISM AND PALEOMAGNETISM]
4302 Geological [NATURAL HAZARDS]
8107 Continental neotectonics [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Shrinking of the Cocos and Nazca Plates due to Horizontal Thermal Contraction and Implications for Plate Non-rigidity and the Non-closure of the Pacific-Cocos-Nazca Plate Motion Circuit (81804)
Richard G Gordon, Rice University, Houston, TX, United States and Corne Kreemer, University of Nevada Reno, Nevada Bureau of Mines and Geology, Reno, United States
Interseismic deformation and creep along the Sumatran fault, Indonesia from InSAR time-series analysis (71025)
Xiaopeng Tong, University of Washington Seattle Campus, Earth and Space Sciences, Seattle, WA, United States, David T Sandwell, University of California San Diego, La Jolla, CA, United States and David A Schmidt, University of Washington, Seattle, United States
Deformation at the Australia-Pacific Boundary in the North Island of New Zealand: Comparison of 20 Years of GPS-recorded Average Deformation With 6.5 Years Time Series of SSEs and Transients (83979)
Alan John Haines, GNS Science-Institute of Geological and Nuclear Sciences Ltd, (emeritus), Lower Hutt, New Zealand, Lada L Dimitrova, University of Texas, Austin, TX, United States, Laura M Wallace, University of Texas at Austin, Institute for Geophysics, Austin, United States and Noel M Bartlow Jackson, University of California San Diego, La Jolla, United States
Over Decades to Centuries, Interseismic Coupling and Deformation Rates along Subduction Zones Are Not Steady (Invited) (59710)
Aron J Meltzner, Nanyang Technological University, Earth Observatory of Singapore, Singapore, Singapore
Undersea interplate coupling off the western Japan revealed by GPS-A observation (77503)
Yusuke Yokota1,2, Tadashi Ishikawa1, Shun-ichi Watanabe2 and Toshiharu Tashiro2, (1)Japan Geoscience Union, Tokyo, Japan, (2)Japan Coast Guard, Tokyo, Japan
Differentiation of Secular and Postseismic Deformation in the Mojave Shear Zone in Southern California and Inference of Lithospheric Rheology (Invited) (83263)
Zhengkang Shen, ITAG Institute of Theoretical and Applied Geophysics, Peking University, Beijing, China, Shaozhuo Liu, King Abdullah University of Science and Technology, Earth Science and Engineering, Thuwal, Saudi Arabia and Roland Burgmann, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, United States
Geodesy-based estimates of loading rates on faults beneath the Los Angeles basin with a new, computationally efficient method to model dislocations in 3D heterogeneous media (84957)
Chris Rollins, California Institute of Technology, Pasadena, CA, United States, Donald F Argus, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, Jean-Philippe Avouac, California Institute of Technology, Geological and Planetary Sciences, Pasadena, CA, United States, Walter Landry, Caltech, Pasadena, CA, United States and Sylvain Barbot, University of Southern California, Department of Earth Sciences, Los Angeles, United States
Continental Deformation in Madagascar from GNSS Observations (Invited) (59993)
Dr. D. Sarah Stamps, PhD1, Tahiry Andriantsoa Andriantsoa Rajaonarison2, Gérard Rambolamanana3, Nia Herimitsinjo3, Raul Carrillo4 and Greg Jesmok5, (1)Virginia Tech, Geosciences, Blacksburg, VA, United States, (2)Virginia Tech, Geosciences, Blacksburg, United States, (3)Institute and Observatory of Geophysics Antananarivo-University of Antananarivo, Physics, Antananarivo, Madagascar, (4)University of California Los Angeles, Los Angeles, CA, United States, (5)University of California, Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States

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