The late Dr. Roy D. Hyndman has had a distinguished career and a lasting influence in many fields of Earth sciences. In this session, we commemorate Dr. Hyndman’s seminal contributions to understanding the architecture, dynamics and hazards of the Cascadia subduction zone and other global subduction zones. We invite contributions from a range of disciplines examining subduction zone processes and dynamics, including earthquakes and seismicity (upper- and lower-plate earthquakes and interface events), slow earthquakes (e.g., episodic tremor and slip) from seismic and geodetic data, geophysical imaging of subduction zone structures, numerical modelling of subduction zone dynamics, ruptures, and earthquake cycle deformation, laboratory and experimental studies of subduction zone materials’ properties, the source, the impact, and the destination of fluids across the subduction system, as well as implementation of earthquake early warning systems. In this session, we will focus predominantly on the Cascadia Subduction Zone, including its transition to other tectonic regimes at its north and south boundaries, but welcome studies of other subduction zones globally. The objective is to hold a session that mirrors the essence of his research, transcending traditional boundaries and embodying the interdisciplinary spirit that he championed by crossing "the boundaries of land and ocean, geology and geophysics, and fundamental research and societal needs" (quote from the citation for his 2017 Geological Association of Canada Logan Medal).
Conveners: Tianhaozhe Sun, Geological Survey of Canada; Andrew Schaeffer, Geological Survey of Canada; Pascal Audet, Department of Earth and Environmental Sciences, University of Ottawa
10:30am - 10:45am Adrift: preliminary analysis of data recovered from an early release PACSAFE Leg 1 OBS off the west coast of British Columbia
Presenter(s): Andrew Schaeffer
10:45am - 11:00am Derivation of Finite Fault Model for 2012 Haida Gwaii Earthquake from RADARSAT-2 DInSAR and GNSS Data
Presenter(s): Sergey Samsonov
11:00am - 11:15am Structure and serpentinization of the Cascadia forearc mantle wedge corner from receiver function modelling
Presenter(s): Pascal Audet
11:15am - 11:30am Fluid pressure oscillation constrained using Bayesian data assimilation in a northern Cascadia subduction zone slow slip event model
Presenter(s): Yajing Liu
11:30am - 11:45am A Weak Oceanic Lithosphere-Asthenosphere Boundary Revealed by Postseismic Deformation of Large Subduction Earthquakes
Presenter(s): Tianhaozhe Sun
11:45am - 12:00pm The Secondary Zone of Subsidence during interseismic deformation of megathrust earthquakes and its implications to hazard assessment
Presenter(s): Kelin Wang
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