GSA Connects 2021 in Portland, Oregon

Session No. 231
Wednesday, 13 October 2021: 1:30 PM-5:30 PM
Portland Ballroom 257 (Hybrid Room) (Oregon Convention Center)

T1. Cascadia Subduction Zone Earthquakes: Geologic, Geophysical, and Modeling Constraints on Rupture Timing and Process

GSA Structural Geology and Tectonics Division; GSA Quaternary Geology and Geomorphology Division; GSA Geophysics and Geodynamics Division; GSA Marine and Coastal Geoscience Division; GSA Geoinformatics and Data Science Division

 

Lydia Staisch, Chris Goldfinger, Nora Nieminski, Maureen Walton and Sean Richard LaHusen, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1:35 PM
REVISED CHRONOLOGY OF EVENT DEPOSITS BEFORE THE 1700 CASCADIA TSUNAMI LAYERS FROM THE SOUTHWEST COAST OF VANCOUVER ISLAND, CANADA
TANIGAWA, Koichiro1, SAWAI, Yuki1, BOBROWSKY, Peter2, HUNTLEY, David H.3, GOFF, James4, SHINOZAKI, Tetsuya1 and ITOU, Kazumi1, (1)Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8567, Japan, (2)Natural Resources Canada, Geological Survey of Canada, Sidney, BC V8L 4B2, Canada, (3)Geological Survey of Canada, Natural Resources Canada, Vancouver, BC V6B 5J3, Canada, (4)School of Biological, Earth and Environmental Sciences, UNSW Australia, Sydney, 2052, Austria
1:50 PM
LAND-LEVEL CHANGES DURING SIX MEGATHRUST EARTHQUAKES OVER THE LAST 3500 YEARS AT THE CASCADIA SUBDUCTION ZONE USING A DIATOM-BASED BAYESIAN TRANSFER FUNCTION (Invited Presentation)
HONG, Isabel, Earth Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada; Department of Geological Sciences, Central Washington University, Ellensburg, WA 98926, CAHILL, Niamh, Department of Mathematics and Statistics, Maynooth University, Maynooth, W23 F2K8, Ireland, ENGELHART, Simon E., Department of Geography, Durham University, Durham, United Kingdom, HAWKES, Andrea D., Department of Earth and Ocean Sciences, University of North Carolina Wilmington, 601 S College Rd, Wilmington, NC 28405, PADGETT, Jason S., Department of Geosciences, University of Rhode Island, Woodward Hall, 9 East Alumni Avenue, Kingston, RI 02881 and HORTON, Benjamin P., Earth Observatory of Singapore, Asian School of the Environment, Nanyang Technological University, Singapore, 639798, Singapore
2:10 PM
RAPID RETREAT OF A POTENTIALLY UPLIFTED COASTAL TERRACE AT RIALTO BEACH, ON THE PACIFIC COAST OF WASHINGTON
TROOST, Kathy Goetz1, DAVIS, Elizabeth J.2, MILLER, Ian3, BUSH, Chelsea4, FREEMAN, Elise5 and BENSON, Mary Alice2, (1)Earth and Space Sciences, University of Washington, Box 351310, Seattle, WA 98195-1310, (2)Earth and Space Sciences, University of Washington, Seattle, WA 98195, (3)Washington Sea Grant, University of Washington, Seattle, WA 98105, (4)Aspect Consulting, LLC, Seattle, WA 98104, (5)University of Washington, Earth and Space Sciences, 4000 15th Avenue NE, Johnson Hall Rm-070, Box 351310, Seattle, WA 98195-1310
2:25 PM
WHAT CAN CASCADIA’S COASTAL LANDSLIDES REVEAL ABOUT COSEISMIC TRIGGERING AND THE PATTERN OF STRONG GROUND MOTION FROM MEGATHRUST EARTHQUAKES?
LAHUSEN, Sean, U.S. Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, 350 N Akron Rd., Moffett Field, CA 94035, PERKINS, Jonathan, U.S. Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, P.O. Box 158, Moffett Field, CA 94035 and GRANT, Alex, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025
2:40 PM
POSSIBLE CO-SEISMIC LANDSLIDE AT RIALTO BEACH, PACIFIC COAST OF WASHINGTON
FREEMAN, Elise1, TROOST, Kathy2, BUSH, Chelsea3, BENSON, Mary Alice4, DAVIS, Elizabeth J.4 and BRUTZKUS, Pamela5, (1)University of Washington, Earth and Space Sciences, 4000 15th Avenue NE, Johnson Hall Rm-070, Box 351310, Seattle, WA 98195-1310, (2)Earth and Space Sciences, University of Washington, Box 351310, Seattle, WA 98195-1310, (3)Aspect Consulting, LLC, Seattle, WA 98104, (4)Earth and Space Sciences, University of Washington, Seattle, WA 98195, (5)B&P Laboratories, Inc., Seattle, WA 97403
2:55 PM
MORPHOLOGIC AND TEMPORAL DISTRIBUTION OF SUBMARINE LANDSLIDES ALONG THE CASCADIA MARGIN
TALAIA-MURRAY, Manique, Earth and Space Sciences, University of Washington, Seattle, Seattle, WA 98195, GRANT, Alex, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025 and HILL, Jenna C., U.S. Geological Survey, Pacific Coastal and Marine Science Center, 2885 Mission Street, Santa Cruz, CA 95060
3:10 PM
SEEKING CONSENSUS – THE SOUTHERN CASCADIA WORKING INTEREST GROUP SCWIG
PATTON, Jay, California Geological Survey, Seismic Hazards, Tsunami Unit, 380 Beach Dr, arcata, CA 95521; Humboldt State University, Department of Geology, 380 beach dr, Arcata, CA 95521, DENGLER, Lori, Humboldt State University, Department of Geology, 380 beach dr, Arcata, CA 95521, NICOLINI, Troy, NOAA, National Weather Service, Eureka, CA 95501 and WILSON, Rick, California Geological Survey, Seismic Hazards, Tsunami Unit, 380 Beach Dr, arcata, CA 95521
Handouts
  • patton_etal_2021_GSA_scwig_final_online.pptx (37.7 MB)
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    3:25 PM
    Break
    3:35 PM
    LOCATION, LOCATION, LOCATION: CASCADIA TURBIDITE STRATIGRAPHY AT THE INTERFACE BETWEEN PALEOSEISMIC AND PALEOCLIMATE RECORDS
    GOLDFINGER, Chris1, WALCZAK, Maureen2, SAHAKIAN, Valerie J.3, REILLY, Brendan4 and VALDEZ HERNANDEZ, Saray2, (1)College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Ocean Admin Bldg 104, Corvallis, OR 97331, (2)College of Earth Ocean and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg, Corvallis, OR 97331, (3)Department of Earth Sciences, University of Oregon, 2357 Grant St, Eugene, OR 97405, (4)Scripps Institution of Oceanography, La Jolla, CA 92093-0220
    3:50 PM
    ESTABLISHING PRECISE AGES FOR PAST CASCADIA SEISMICITY USING MULTIPROXY TREE-RING RECORDS (Invited Presentation)
    PEARL, Jessie, Seattle, WA 98195, BLACK, Bryan, Laboratory of Tree-Ring Research, University of Arizona, 1215 E. Lowell St., Tucson, AZ 85721, PRINGLE, Patrick, Dept. of Earth Science, Centralia College, 600 West Locust, Centralia, WA 98531, SHERROD, Brian L., Earthquake Science Center, U.S. Geological Survey, University of Washington, Box 351310, Seattle, WA 98195, ANGSTER, Stephen, U.S. Geological Survey, Earthquake Science Center, UNIVERSITY OF WASHINGTON, Seattle, WA 98195 and JOHNS, Wes, Geology Department, Western Washington University, Bellingham, WA 98225
    4:10 PM
    ROCK PILLARS AS GROUND MOTION CONSTRAINTS IN OREGON AND CALIFORNIA, USA
    MCPHILLIPS, Devin1, GARCÍA SUÁREZ, Joaquín2, SCHARER, Katherine1 and ASIMAKI, Domniki3, (1)U.S. Geological Survey, Earthquake Science Center, 525 South Wilson Ave, Pasadena, CA 91106, (2)Swiss Federal Institute of Lausanne, Rue Cantonale, Lausanne, 1015, Switzerland, (3)Mechanical and Civil Engineering, California Institute of Technology, MC 104-44, Pasadena, CA 91125
    4:25 PM
    PALEOSEISMIC CONSTRAINTS ON MAXIMUM COSEISMIC SLIP IN THE CASCADIA SUBDUCTION ZONE, A KEY FACTOR FOR PROBABILISTIC TSUNAMI HAZARD ASSESSMENT (PTHA)
    PRIEST, George, Virginia Institute of Marine Science, William & Mary, PO Box 738, Newport, OR 97365-0055 and ALLAN, Jonathan, Newport Coastal Field Office, Oregon Dept. of Geology and Mineral Industries, PO Box 1033, Newport, OR 97365-0055
    4:40 PM
    PROPAGATOR WAKES OF THE JUAN DE FUCA PLATE - ARE THEY WEAKER OR STRONGER THAN THE SURROUNDING OCEANIC CRUST?
    ASHRAF, Asif, University of Nebraska-Lincoln Earth and Atmospheric Sciences, 1421 N 9th St, Lincoln, NE 68508-1073 and FILINA, Irina, University of Nebraska - Lincoln, 1215 U St, Lincoln, NE 68588-0039
    4:55 PM
    PALEOSEISMIC SURF AND TURF: UPDATES FROM THE USGS POWELL CENTER CASCADIA EARTHQUAKE WORKING GROUP ON SYSTEMATIC INTEGRATION OF ONSHORE AND OFFSHORE RECORDS AND FUTURE DIRECTIONS
    STAISCH, Lydia1, WATT, Janet2, WITTER, Robert3, PERKINS, Jonathan4, BROTHERS, Daniel S.5, DURA, Tina6, GOLDFINGER, Chris7, GRANT, Alex8, HAWKES, Andrea D.9, HILL, Jenna C.5, KELSEY, Harvey M.10, SHERROD, Brian L.11, ENGELHART, Simon E.12, ENKIN, Randy13, GOMBERG, Joan11, HAMILTON, Tark13, HONG, Isabel14, JAFFE, Bruce15, GARRISON-LANEY, Carrie16, LA SELLE, SeanPaul17, MEIGS, Andrew18, MELGAR, Diego19, NIEMINSKI, Nora20, PADGETT, Jason S.21, PATTON, Jason R.22, PEARL, Jessie23, PILARCZYK, Jessica21, SAHAKIAN, Valerie J.24, STANTON, Kelsay25 and WALTON, Maureen26, (1)U.S. Geological Survey, 2130 SW 5th Ave, Portland, OR 97201, (2)USGS Pacific Coastal and Marine Science Center, U.S. Geological Survey, 2885 Mission Street, Santa Cruz, CA 95060, (3)Alaska Science Center, U.S.G.S., Anchorage, AK 99508, (4)U.S. Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, P.O. Box 158, Moffett Field, CA 94035, (5)U.S. Geological Survey, Pacific Coastal and Marine Science Center, 2885 Mission Street, Santa Cruz, CA 95060, (6)4044 Derring Hall, 926 W Campus Dr, Blacksburg, VA 24061-1040, (7)College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Ocean Admin Bldg 104, Corvallis, OR 97331, (8)U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, (9)Geology & Geophysics Department, Woods Hole Oceanographic Institution, MS #22, 266 Woods Hole Rd, Woods Hole, MA 02543, (10)Geology Department, Humboldt State University, Arcata, CA 95521, (11)Earthquake Science Center, U.S. Geological Survey, University of Washington, Box 351310, Seattle, WA 98195, (12)Department of Geography, Durham University, Durham, United Kingdom, (13)Natural Resources Canada, Sidney, BC V8L 4B2, Canada, (14)Simon Fraser, Burnaby, BC V5A 1S6, Canada, (15)US Geological Survey, 2885 Mission Street, Santa Cruz, CA 95060, (16)Washington Sea Grant, Seattle, WA 98105, (17)US Geological Survey, Pacific Coastal and Marine Science Center, 2885 Mission Street, Santa Cruz, CA 95060, (18)Oregon State University, College of Earth, Ocean, Atmospheric Science, Corvallis, OR 97330, (19)University of Oregon, Eugene, OR 97403, (20)U.S. Geological SurveyPacific Coastal & Marine ScienceCenter, 2885 Mission St, Santa Cruz, CA 95060-5756, (21)Department of Earth Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada, (22)Conservation, California Geological Survey, 801 K St., Sacramento, CA 95814, (23)Seattle, WA 98195, (24)Department of Earth Sciences, University of Oregon, 2357 Grant St, Eugene, OR 97405, (25)Earth and Space Sciences, University of Washington, Seattle, WA 98195, (26)U.S. Geological SurveyPacific Coastal & Marine Science Ctr, 2885 Mission St, Santa Cruz, CA 95060-5756
     
    5:10 PM
    Discussion
    See more of: Technical Sessions