T43G:
Scientific Advances from Subduction Zone Observatories II


Session ID#: 10809

Session Description:
Subduction zones contain the Earth’s richest diversity of tectonic processes, from plate-scale over millennia to grain-scale over micro-seconds. Most span continental to oceanic environments, and interact with climatological and biological processes, which multiplies the diversity and observational challenges, but also opportunities to leverage and learn.  Finally, subduction zones host many of Earth’s most extreme natural events, which coupled with increasing human populations, leads to an urgent need to understand how they work. The scientific community is exploring the potential to develop a new Subduction Zone Observatory (SZO) as a multidisciplinary facility, stretching along several circum-Pacific’s subduction zones.  A SZO would provide a comprehensive suite of multidisciplinary onshore and offshore observations to understand the entire subduction zone system.  We welcome contributions that show scientific advances resulting from coordinated instrumentation, sampling, and analog experimentation/modeling of a subduction zone, or present scientific ideas and findings relevant to future development of a SZO.
Primary Convener:  Joan S Gomberg, USGS, Seattle, United States
Conveners:  Douglas Wiens, Washington University in St Louis, St. Louis, MO, United States, Katherine A Kelley, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States and Anne Meltzer, Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States
Chairs:  Douglas Wiens, Washington University in St. Louis, St. Louis, MO, United States and Anne Meltzer, Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States
OSPA Liaison:  Anne Meltzer, Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States

Cross-Listed:
  • G - Geodesy
  • NH - Natural Hazards
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
7240 Subduction zones [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Seismicity and Structure of the Incoming Pacific Plate Subducting into the Japan Trench off Miyagi (68937)
Koichiro Obana1, Gou Fujie1, Shuichi Kodaira2, Tsutomu Takahashi1, Yojiro Yamamoto1, Takeshi Sato1, Mikiya Yamashita1, Yasuyuki Nakamura3 and Seiichi Miura1, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, (3)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Research Institute for Marine Geodynamics, Yokohama, Japan
JFAST Constraints on the Tohoku Earthquake Fault (Invited) (74210)
Emily E Brodsky, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States, James J Mori, Kyoto University, Kyoto, Japan, Frederick M Chester, Texas A & M University, Center for Tectonophysics and the Department of Geology and Geophysics, College Station, TX, United States, Shuichi Kodaira, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan and IODP Exp 343/343T
Slip to the Trench for Great Subduction Earthquakes (85817)
James J Mori, Kyoto University, Kyoto, Japan
Boron Isotopic Fractionation During the First ~50 km of Sediment Subduction in the Nankai Trough, Japan (71316)
Maureen D Feineman, The Pennsylvania State University, Department of Geosciences, University Park, PA, United States, Michael R Hudak, Pennsylvania State University Main Campus, University Park, PA, United States, Demian M. Saffer, Penn State University, Department of Geosciences, University Park, PA, United States and Samuele Agostini, IGG-CNR, Pisa, Italy
Frictional behavior of carbonate-rich sediments in subduction zones (63533)
Hannah S Rabinowitz1, Heather M Savage1, Brett M Carpenter2 and Cristiano Collettini3, (1)Columbia University of New York, Palisades, NY, United States, (2)National Institute of Geophysics and Volcanology, Rome, Italy, (3)Sapienza University of Rome, Rome, Italy
Long-term Observation of Seafloor Disturbances by Array of Pressure Gauges (69547)
Yoshio Fukao, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Hiroko Sugioka, Kobe University, Graduate School of Science, Kobe, Japan, Aki Ito, JAMSTEC, Yokosuka, Japan and Hajime Shiobara, University of Tokyo, Bunkyo-ku, Japan
Postseismic deformation of the 2011 Tohoku-Oki earthquake revealed by repeated GPS/Acoustic observations (78128)
Fumiaki Tomita1, Motoyuki Kido1, Yusaku Ohta2, Ryota Hino2, Yukihito Osada2 and Takeshi Iinuma3, (1)Tohoku University, International Research Institute of Disaster Science, Sendai, Japan, (2)Tohoku University, Graduate School of Science, Sendai, Japan, (3)Japan Agency for Marine-Earth Science and Technology, Research and Development Center for Earthquake and Tsunami, Yokohama, Japan
Change in anisotropic P-wave velocity observed by seafloor borehole observatory C0002G in the Nankai Trough subduction zone. (83706)
Eiichiro Araki1, Toshinori Kimura1, Yuya Machida1, Seiichi Miura1 and Shuichi Kodaira2, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan

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