Session: Building the SZ4D Faulting and Earthquake Cycles Theme: What Controls Strain Accumulation and Release at Subduction Zones? (GSA 2020 Connects Online)

Session No. 225

Thursday, 29 October 2020: 5:30 PM-8:00 PM

T15. Building the SZ4D Faulting and Earthquake Cycles Theme: What Controls Strain Accumulation and Release at Subduction Zones?

GSA Structural Geology and Tectonics Division; GSA Geodynamics and Geophysics Division

Christine Regalla, Harold J. Tobin, Melodie French and Donna J. Shillington, Advocates

Paper #

Start Time

225-1

5:30 PM

STRESS EVOLUTION DURING THE MEGATHRUST EARTHQUAKE CYCLE AND ITS ROLE IN TRIGGERING EXTENSIONAL DEFORMATION IN SUBDUCTION ZONES (Invited Presentation)

HERMAN, Matthew W., Department of Geological Sciences, California State University Bakersfield, Bakersfield, CA 93311, GOVERS, Rob, Department of Earth Sciences, Utrecht University, P.O. Box 80021, Utrecht, 3508 TA, Netherlands and FURLONG, Kevin P., Department of Geosciences, Pennsylvania State University

225-2

5:45 PM

PRE-SEISMIC FAULT CREEP AND THE EVOLUTION OF ELASTIC WAVE PROPERTIES FOR SLOW AND FAST LABORATORY EARTHQUAKES (Invited Presentation)

SHREEDHARAN, Srisharan¹, BOLTON, David Chas¹, RIVIERE, Jacques² and MARONE, Chris¹, (1)Department of Geosciences, The Pennsylvania State University, 522 Deike, University Park, PA 16802, (2)Department of Engineering Sciences and Mechanics, The Pennsylvania State University, University Park, PA 16803

225-3

6:00 PM

A NORTHERN CORDILLERAN BLUESCHIST-ECLOGITE TRANSITION ZONE AS A SEISMICITY SOURCE REGION: LAWSONITE ECLOGITES FROM THE YUKON-TANANA TERRANE, YUKON, CANADA (Invited Presentation)

FABER, Carly, Department of Earth and Planetary Sciences, McGill University, 3450 University street, Montreal, QC H3A0E8, Canada and ROWE, Christie D., Dept of Earth and Planetary Sciences, McGill University, 3450 University street, Montreal, QC H3A 0E8, Canada

225-4

6:15 PM

ASSESSING TEMPORAL VARIABILITY OF COASTAL DEFORMATION DURING MEGATHRUST EARTHQUAKES AT THE CASCADIA SUBDUCTION ZONE USING A DIATOM BAYESIAN TRANSFER FUNCTION

HONG, Isabel¹, CAHILL, Niamh², ENGELHART, Simon E.³, HAWKES, Andrea D.⁴, PADGETT, Jason S.³ and HORTON, Benjamin P.⁵, (1)Department of Geological Sciences, Central Washington University, Ellensburg, WA 98926; Department of Earth Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada, (2)Department of Mathematics and Statistics, Maynooth University, Maynooth, W23 F2K8, Ireland, (3)Department of Geography, Durham University, Durham, United Kingdom, (4)Department of Earth and Ocean Sciences, University of North Carolina Wilmington, 601 S College Rd, Wilmington, NC 28405, (5)Asian School of the Environment, Earth Observatory of Singapore, Nanyang Technological University, Singapore, 639798, Singapore

225-5

6:30 PM

THE APPLICATION OF DIATOM ANALYSIS TO RECONSTRUCT COSEISMIC UPLIFT ON MONTAGUE ISLAND, ALASKA

DEPAOLIS, Jessica M.¹, WITTER, Robert C.², DURA, Tina¹, BENDER, Adrian², HAEUSSLER, Peter J.², CURRAN, Janet² and LEONI, Marguerite³, (1)Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, (2)Alaska Science Center, U.S.G.S., Anchorage, AK 99508, (3)University of Alaska Anchorage, Anchorage, AK 99508

225-6

6:45 PM

LIMITS OF PRIOR MEGATHRUST RUPTURE FROM STRATIGRAPHIC AND MICROFOSSIL OBSERVATIONS AT SITKALIDAK ISLAND, AK

PRATER, Alexa¹, DURA, Tina¹, BRIGGS, Richard W.², WITTER, Robert C.³, ENGELHART, Simon E.⁴, KOEHLER, Richard D.⁵ and PADGETT, Jason S.⁶, (1)Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, (2)U.S. Geological Survey, Geologic Hazards Science Center, 1711 Illinois Ave., Golden, CO 80401, (3)Alaska Science Center, U.S.G.S., Anchorage, AK 99508, (4)Department of Geography, Durham University, Durham, United Kingdom, (5)Nevada Bureau of Mines and Geology, University of Nevada, Reno, 1664 N. Virginia St. MS 178, University of Nevada, Reno, NV 89557, (6)Department of Earth Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada

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