T53C:
Subduction Zone Processes at the Hikurangi Margin, New Zealand I


Submit an Abstract to this Session


Session ID#: 56970

Session Description:
The Hikurangi subduction zone offshore New Zealand's North Island exhibits pronounced along-strike changes in margin characteristics that make it an outstanding natural laboratory to investigate a wide range of fundamental subduction processes. This unique aspect of the subduction zone has sparked a plethora of new onshore and offshore geological and geophysical investigations. These experiments are helping to unravel the physical processes that control subduction plate boundary geodynamics and deformation.  Recent efforts include scientific ocean drilling, multiple active and passive seismic experiments, seafloor geodetic deployments, and paleoseismic investigations.  We welcome submissions that advance understanding of the Hikurangi subduction zone, including processes that underlie slow slip events and earthquake cycle behavior, volcanism and intra-arc rifting, volatile and fluid cycling, long-term subduction margin evolution, and geohazards associated with the plate boundary. Modeling studies, and comparative studies with other subduction zones to elucidate factors controlling subduction zone processes are also very welcome.
Primary Convener:  Laura M Wallace, GNS Science, Lower Hutt, New Zealand; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Conveners:  Rebecca E Bell, Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, Kimihiro Mochizuki, University of Tokyo, Earthquake Research Institute, Bunkyo-ku, Japan and Demian M Saffer, Pennsylvania State University, University Park, United States
Primary Liaison:  Laura M Wallace, University of Texas at Austin, Institute for Geophysics, Austin, United States
Chairs:  Laura M Wallace, University of Texas at Austin, Institute for Geophysics, Austin, United States and Kimihiro Mochizuki, University of Tokyo, Earthquake Research Institute, Bunkyo-ku, Japan
OSPA Liaison:  Rebecca E Bell, Imperial College London, Department of Earth Science and Engineering, London, United Kingdom

Cross-Listed:
  • G - Geodesy
  • NH - Natural Hazards
  • S - Seismology
Index Terms:

1207 Transient deformation [GEODESY AND GRAVITY]
7230 Seismicity and tectonics [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]
8185 Volcanic arcs [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Calibrating the turbidite paleoseismometer on the Hikurangi margin, New Zealand, using the 2016 Mw7.8 Kaikōura earthquake. (405633)
Jamie Howarth1, Alan R Orpin2, Scott Nodder2, Danielle McCleery3, Lorna J Strachan4, Joshu J Mountjoy5, Philip M. Barnes6, Caroline Francois-Holden7 and Helen Clare Bostock8, (1)Victoria University of Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand, (2)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (3)Victoria University of Wellington, Wellington, New Zealand, (4)University of Auckland, Auckland, New Zealand, (5)Earth Sciences New Zealand, Wellington, New Zealand, (6)National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, (7)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (8)NIWA, Wellington, New Zealand
Static and Time-Dependent Inversions of Slow Slip at the Hikurangi Subduction Zone, New Zealand, Using Numerical Green’s Functions (387063)
Charles A Williams Jr, GNS Science, Lower Hutt, New Zealand, Laura M Wallace, University of Texas at Austin, Institute for Geophysics, Austin, United States, Noel M Jackson, University of California Berkeley, Berkeley, CA, United States and Ryan Michael Yohler, University of Missouri Columbia, Columbia, MO, United States
Episodic Stress Tensor and Fluid Pressure Cycling in Subducting Oceanic Crust During Northern Hikurangi Slow Slip Events (Invited) (424039)
Emily Warren-Smith1, Bill Fry1, Enrique Chon2, Stuart A Henrys3, Anne Sheehan4, Kimihiro Mochizuki5 and Susan Y Schwartz6, (1)GNS Science, Lower Hutt, New Zealand, (2)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (3)Earth Sciences New Zealand, Lower Hutt, New Zealand, (4)University of Colorado at Boulder, Boulder, United States, (5)University of Tokyo, Earthquake Research Institute, Bunkyo-ku, Japan, (6)University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States
Seamount Subduction Prolongs Shallow Slow Slip Event in the Forearc of the Northern Hikurangi Subduction Zone, New Zealand (423048)
Susan Y Schwartz, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States, Heather R Crume, Santa Cruz Geophysics, Santa Cruz, United States and Erin Todd, University of Otago, Dunedin, New Zealand
Extremely long duration of ground motion arising from sedimentary structures above slow slip areas of the Hikurangi subduction zone (406665)
Yoshihiro Kaneko, Kyoto University, Department of Geophysics, Kyoto, Japan, Yoshihiro Ito, Kyoto University, Disaster Prevention Research Institute, Kyoto, Japan, Bryant Chow, Victoria University Wellington, Wellington, New Zealand, Laura M Wallace, University of Texas, Institute for Geophysics, Austin, TX, United States, Carl Tape, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, United States, Elisabetta D'Anastasio, GNS Science Te Pῡ Ao, Wellington, New Zealand, Ronni Grapenthin, University of California Berkeley, Berkeley, United States and Ryota Hino, Tohoku University, Graduate School of Science, Sendai, Japan
The relationship between forearc structure and geodetic locking along the Hikurangi margin from SHIRE seismic data (424963)
Dan Bassett1, Stuart A Henrys1, Daniel H N Barker2, Adrien F Arnulf3, Ryuta Arai4, Shuichi Kodaira5, Harm J Van Avendonk6, Nathan L Bangs7, Gou Fujie8, Yojiro Yamamoto8, Koichiro Obana9, Jess Irene Tsahai Hillman10 and SHIRE Team, (1)Earth Sciences New Zealand, Lower Hutt, New Zealand, (2)GNS Science, Lower Hutt, New Zealand, (3)Scripps Institution of Oceanography, La Jolla, United States, (4)University of Hawaii at Manoa, Honolulu, United States, (5)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan, (6)University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, (7)Univ Texas, Institute for Geophysics, Austin, United States, (8)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, (9)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamics, Kanagawa, Japan, (10)University of Otago, Dunedin, New Zealand
Large Underplated Structures along the Southern Hikurangi Margin: Preliminary Results from the SHIRE Seismic Imaging Experiment (411681)
Nathan L Bangs1, Harm J Van Avendonk2, Adrien F Arnulf3, Andrew Gase4, Stuart A Henrys5, David A Okaya6, Daniel H N Barker7, Katie Jacobs7, Gou Fujie8, Ryuta Arai9, Shuichi Kodaira10 and The SHIRE Research Team, (1)University of Texas Institute for Geophysics, Austin, United States, (2)University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, (3)University of Texas at Austin, Institute for Geophysics, Austin, United States, (4)University of Texas, Institute for Geophysics, Austin, United States, (5)Earth Sciences New Zealand, Lower Hutt, New Zealand, (6)University of Southern California, Department of Earth Sciences, Los Angeles, United States, (7)GNS Science, Lower Hutt, New Zealand, (8)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, (9)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Subduction Dynamics Research Center, Yokohama, Japan, (10)Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan

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