T44C:
Seafloor Geodesy: Measuring Deformation of the Seabed I


Submit an Abstract to this Session


Session ID#: 57212

Session Description:
Seafloor geodetic methods allow for measuring crustal deformation over Earth’s vast areas that are covered by water, and therefore inaccessible to standard geodetic techniques. Over the last decade, remarkable technological progress has been made to increase the precision and scales of observations, while improving the reliability and cost effectiveness of the instrumentation.

Unquestionably, seafloor geodetic measurements will continue to significantly advance our understanding of the motion and deformation of oceanic tectonic plates, earthquake processes in subduction zones, and the deformation of submarine volcanoes and spreading centers. Moreover, non-tectonic targets such as slope stability, underwater mass movements, extraction of hydrocarbons, and the sequestration of CO2 into the ocean floor can be monitored.

We invite abstracts that highlight seafloor geodetic (e.g. GPS/A, differential bathymetry, seafloor pressure, acoustic ranging, seismometry, gravity, tilt, and strain) measurement systems, data processing methods, observational results, and modeling studies.

Primary Convener:  Martin Heesemann, University of Victoria, Ocean Networks Canada, Victoria, BC, Canada
Conveners:  Kelin Wang, Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada, Yusaku Ohta, Tohoku University, Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Sendai, Japan and Matthew James Cook, University of California, San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
Primary Liaison:  Martin Heesemann, University of Victoria, Ocean Networks Canada, Victoria, BC, Canada
Chairs:  Martin Heesemann, University of Victoria, Ocean Networks Canada, Victoria, BC, Canada, Yusaku Ohta, Tohoku University, Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Sendai, Japan and Matthew James Cook, University of California, San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
OSPA Liaison:  Martin Heesemann, University of Victoria, Ocean Networks Canada, Victoria, BC, Canada
Co-Organized with:
Tectonophysics, and Ocean Sciences

Proposed Co-Organized Session with:
  • G - Geodesy
  • OS - Ocean Sciences
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
3050 Ocean observatories and experiments [MARINE GEOLOGY AND GEOPHYSICS]
8170 Subduction zone processes [TECTONOPHYSICS]
8194 Instruments and techniques [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Temporal variation of seafloor movement fields along the Nankai Trough suggested by the GNSS-A (358458)
Yusuke Yokota, Japan Coast Guard, Hydrographic and Oceanographic Department of Japan, Tokyo, Japan and Tadashi Ishikawa, Japan Coast Guard, Hydrographic and Oceanographic Department, Tokyo, Japan
Expansion of GPS-Acoustic Arrays offshore the Cascadia and Alaska Subduction Zones (452971)
C David Chadwell, University of California San Diego, La Jolla, CA, United States, David A Schmidt, University of Washington Seattle, Department of Earth and Space Sciences, Seattle, United States, Spahr C Webb, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Scott L Nooner, University of North Carolina at Wilmington, Dept of Earth and Ocean Sciences, Wilmington, NC, United States, Todd L Ericksen, U.S. Geological Survey, Earthquake Science Center, Moffett Field, United States, Benjamin A. Brooks, US Geological Survey, Menlo Park, United States and James H Foster, University of Hawaii, Hawaii Institute of Geophysics and Planetology, Honolulu, HI, United States
Recent progresses in GNSS-Acoustic positioning technique and results in the off-Tohoku region, Japan (Invited) (353581)
Fumiaki Tomita1, Chie Honsho1 and Motoyuki Kido2, (1)Tohoku University, Graduate School of Science, Sendai, Japan, (2)Tohoku University, International Research Institute of Disaster Science, Sendai, Japan
Direct path ranging on seafloor: measuring precise and continuous horizontal movement (348413)
Ryusuke Yamamoto1, Motoyuki Kido2 and Ryota Hino1, (1)Tohoku University, Graduate School of Science, Sendai, Japan, (2)Tohoku University, International Research Institute of Disaster Science, Sendai, Japan
Seafloor geodesy calibration from sidescan sonar surveys of the Ayu Trough (418731)
John Boone DeSanto, University of Washington, Seattle, United States, David T Sandwell, Scripps Institution of Oceanography, University of California San Diego, Institute of Geophysics and Planetary Physics, La Jolla, United States and C David Chadwell, University of California San Diego, La Jolla, CA, United States
The Detectability of Offshore Slow Slip Earthquakes with Seafloor Pressure Sensors: A Sensitivity Analysis for the Cascadia Subduction Zone (Invited) (356517)
Erik K Fredrickson1, William S D Wilcock2, Parker MacCready1, Emily C Roland3, David A Schmidt4, Mark A Zumberge5, Glenn S Sasagawa6 and Alexander L Kurapov7, (1)University of Washington, School of Oceanography, Seattle, United States, (2)University of Washington Seattle Campus, School of Oceanography, Seattle, United States, (3)Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, (4)University of Washington Seattle, Department of Earth and Space Sciences, Seattle, United States, (5)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (6)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (7)COAS/Oregon State Univ, Corvallis, United States
A mobile pressure gauge for calibrating pressure sensors on the seafloor with a resolution less than 1 hPa (459041)
Yuya Machida1, Shuhei Nishida1, Toshinori Kimura1 and Eiichiro Araki2, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Research Institute for Marine Geodynamics, Yokosuka, Japan
Calibrated pressure measurements for seafloor geodesy (376237)
Matthew James Cook1, Glenn S Sasagawa1 and Mark A Zumberge2, (1)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (2)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States

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