GSA Annual Meeting in Seattle, Washington, USA - 2017

Session No. 58
Sunday, 22 October 2017: 1:30 PM-5:30 PM
Yakima 1 (The Conference Center)

T236. Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami Hazards

GSA Geophysics and Geodynamics Division; GSA Sedimentary Geology Division; GSA Structural Geology and Tectonics Division
Robert C. Witter, Lydia Staisch and Joan Gomberg, Advocates
1:30 PM
THE TIMING AND DEFORMATION OF CASCADIA SUBDUCTION ZONE EARTHQUAKES FROM COASTAL MARSH RECORDS OF OREGON (Invited Presentation)
ENGELHART, Simon E., Department of Geosciences, University of Rhode Island, Kingston, RI 02881, CAHILL, Niamh, Department of Biostatistics and Epidemiology, University of Massachusetts Amherst, Amherst, MA 01003, HAWKES, Andrea, Earth and Ocean Sciences, University of North Carolina Wilmington, 601 S. College Road DeLoach Hall, Wilmington, NC 28403, HORTON, Benjamin P., Sea Level Research, Department of Marine and Coastal Science, Rutgers University, 71 Dudley Road, New Brunswick, NJ 08901, KEMP, Andrew C., Department of Earth and Ocean Sciences, Tufts University, Medford, MA 02155, MILKER, Yvonne, Department of Earth Sciences, Center for Earth System Research and Sustainability, Institut for Geology, Hamburg, 20146, Germany, NELSON, Alan R., Geologic Hazards Science Center, U.S.G.S., Golden, CO 80401, PADGETT, J. Scott, Department of Geosciences, University of Rhode Island, Woodward Hall, 9 E Alumni Avenue, Kingston, RI 02881, WANG, Kelin, School of Earth and Ocean Sciences, University of Victoria, Victoria, BC V8P 5C2, Canada and WITTER, Robert C., Alaska Science Center, U.S.G.S., Anchorage, AK 99508, engelhart@uri.edu
1:50 PM
ASSESSING THE UTILITY OF δ13C AND BULK GEOCHEMISTRY IN ESTUARIES ALONG THE CASCADIA SUBDUCTION ZONE FOR COASTAL PALEOSEISMOLOGY
O'DONNELL III, Robert J.1, HAWKES, Andrea D.1, LANE, Chad S.2, ENGELHART, Simon E.3, HORTON, Benjamin P.4, BOBROWSKY, Peter5, SAWAI, Yuki6, WITTER, Robert C.7, NELSON, Alan R.8 and TANIGAWA, Koichiro9, (1)Earth and Ocean Sciences, University of North Carolina Wilmington, 5600 Marvin K. Moss Lane, Wilmington, NC 28409, (2)Earth and Ocean Sciences, University of North Carolina Wilmington, 601 S. College Road, Wilmington, NC 28403, (3)Department of Geosciences, University of Rhode Island, Kingston, RI 02881, (4)Department of Marine and Coastal Science, Rutgers University, New Brunswick, NJ 08901, (5)Natural Resources Canada, Geological Survey of Canada, Sidney, BC V8L 4B2, Canada, (6)Faculty of Horticulture, Chiba University, 648 Matsudo, Matsudo, 271-8510, Japan, (7)Alaska Science Center, U.S.G.S., Anchorage, AK 99508, (8)Geologic Hazards Science Center, U.S.G.S., Golden, CO 80401, (9)Geological Survey of Japan, AIST, Tsukuba, 305-8567, Japan, rjo2661@uncw.edu
2:05 PM
THE CASCADIA SUBDUCTION ZONE EARTHQUAKE(S) FROM ABOUT 600 CAL YR BP: A FULL SUBDUCTION ZONE RUPTURE, A SERIES OF RUPTURES, OR A NORTHERN SEGMENT RUPTURE?
GARRISON-LANEY, Carrie, Department of Earth and Space Sciences, University of Washington, Johnson Hall Rm-070, Box 351310, 4000 15th Avenue NE, Seattle, WA 98195-1310; Washington Sea Grant, College of the Environment, University of Washington, 3716 Brooklyn Ave NE, Seattle, WA 98105, cegl@uw.edu
2:20 PM
MICROFOSSIL MEASURES OF SUBSIDENCE DURING PAST PLATE-BOUNDARY EARTHQUAKES: THEIR ACCURACY REVEALED BY A SUDDEN TIDAL-FLOODING EXPERIMENT IN CASCADIA
DURA, Tina, Department of Marine and Coastal Science, Rutgers University, New Brunswick, NJ 08901, HORTON, Benjamin P., Earth Observatory of Singapore, Asian School of the Environment, Nanyang Technological University, Singapore, 639798, Singapore, MILKER, Yvonne, Department of Earth Sciences, Center for Earth System Research and Sustainability, Institut for Geology, Hamburg, 20146, Germany, WANG, Kelin, Pacific Geoscience Centre, Geological Survey Canada, 9860 West Saanich Road, Room. 4714, Sidney, BC V8L 4B2, Canada, BRIDGELAND, W.T., Oregon Coast National Wildlife Refuge, Bandon, OR 97411, BROPHY, Laura, Institute for Applied Ecology, Oregon State University, Corvallis, OR 97331-5503, EWALD, M., Institute for Applied Ecology, Oregon State University, 104 CEOAS Administration Building, Corvallis, OR 97331-5503, KHAN, Nicole S., St. Petersburg Coastal and Marine Science Center, U.S.G.S., St. Petersburg, FL 33701, ENGELHART, Simon E., Department of Geosciences, University of Rhode Island, Kingston, RI 02881, NELSON, Alan R., Geologic Hazards Science Center, U.S.G.S., Golden, CO 80401 and WITTER, Robert C., Alaska Science Center, U.S.G.S., Anchorage, AK 99508, dura@marine.rutgers.edu
2:35 PM
INTER- AND INTRA-SITE VARIABILITY OF COSEISMIC SUBSIDENCE ESTIMATES FROM NORTHERN HUMBOLDT BAY, CALIFORNIA
PADGETT, J. Scott, Department of Geosciences, University of Rhode Island, Woodward Hall, 9 East Alumni Avenue, Kingston, RI 02881, ENGELHART, Simon E., Department of Geosciences, University of Rhode Island, Kingston, RI 02881, KELSEY, Harvey, Department of Geology, Humboldt State University, 1 Harpst Street, Arcata, CA 95521 and WITTER, Robert C., Alaska Science Center, U.S.G.S., Anchorage, AK 99508, jason_padgett@uri.edu
2:50 PM
PERPLEXING RECORDS OF COSEISMIC SUBSIDENCE: EVALUATION OF SOURCES FOR COSEISMIC SUBSIDENCE IN THE SOUTHERN CASCADIA SUBDUCTION ZONE, NORTHERN CALIFORNIA
PATTON, Jason Robert1, LEROY, Thomas H.2, WILLIAMS, Todd Brian3, HEMPHILL-HALEY, Mark A.4, MCPHERSON, Robert4 and ANDERSON, Jeffrey K.5, (1)Geology, Humboldt State University, HSU, Dept. of Geology, Arcata, CA 95521; Cascadia GeoSciences, 380 Beach Dr., Arcata, CA 95521, (2)Pacific Watershed Associates / Cascadia Geosciences, 1652 Holly, McKinleyville, CA 95519, (3)Cascadia GeoSciences, 380 Beach Dr., Arcata, CA 95521, (4)Geology, Humboldt State University, HSU, Dept. of Geology, Arcata, CA 95521, (5)Northern Hydrology and Engineering, McKinleyville, CA 95519, Jason.Patton@humboldt.edu
 
3:05 PM
Break
3:20 PM
PROPENSITY FOR DEEP-SEATED LANDSLIDES IN THE OREGON COASTAL RANGES DURING CASCADIA MEGATHRUST EARTHQUAKES THROUGH DENDROCHRONOLOGICAL DATING OF LANDSLIDE-DAMMED LAKES (Invited Presentation)
STRUBLE, William, Earth Sciences, University of Oregon, Eugene, OR 97403, ROERING, Joshua, Department of Geological Sciences, University of Oregon, 1272 E. 13th Ave, Eugene, OR 97403-1272, BURNS, William J., Oregon Department of Geology and Mineral Industries, Oregon Department of Geology and Mineral Industries, 800 NE Oregon Street #28, Suite 965, Portland, OR 97232, BLACK, Bryan, Marine Science Institute, University of Texas at Austin, Port Aransas, TX 78373, CALHOUN, Nancy, Geohazards Section, Oregon Department of Geology and Mineral Industries, 800 NE Oregon Street #28, Suite 965, Portland, OR 97232 and WETHERELL, Logan R., Department of Geological Sciences, Central Washington University, Ellensburg, WA 98926, wstruble@uoregon.edu
3:40 PM
A PRIMER ON PALEOLIQUEFACTION INVERSE-ANALYSIS AND ITS RESEARCH POTENTIAL IN CASCADIA
MAURER, Brett W., Department of Civil and Environmental Engineering, University of Washington, More Hall 132H, Box 352700, Seattle, WA 98195, bwmaurer@uw.edu
Handouts
  • Maurer.pdf (3.0 MB)
  • 3:55 PM
    MODELING THE CASCADIA PALEOSEISMIC RECORD OF LARGE EARTHQUAKE CLUSTERS USING LONG-TERM FAULT MEMORY
    SALDITCH, Leah1, BROOKS, Edward1, STEIN, Seth1, SPENCER, Bruce D.2 and CAMPBELL, Michael1, (1)Earth and Planetary Sciences, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, (2)Department of Statistics and Institute for Policy Research, Northwestern University, Evanston, IL 60208, leah@earth.northwestern.edu
    4:10 PM
    RETRODICTING CASCADIA SUBDUCTION ZONE GREAT EARTHQUAKE SOURCE CHARACTERISTICS FROM TSUNAMI INUNDATION ALONG THE OREGON COAST
    MEIGS, Andrew1, KIRBY, Eric1, MASON, H. Benjamin2, WILSON, Greg1, ARMSTRONG, Emma1, MARCELLI, Marina1 and SPRUELL, John1, (1)College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Wilkinson 202D, Corvallis, OR 97331, (2)Civil and Construction Engineering, Oregon State University, Corvallis, OR 97331, meigsa@geo.oregonstate.edu
    4:25 PM
    LANDWARD VERGENCE IN ACCRETIONARY WEDGES: EVIDENCE FOR PAST SEAFLOOR RUPTURES?
    CUBAS, Nadaya, ISTeP, Université Pierre et Marie Curie, UPMC, 4 place jussieu, Paris, 75005, France and SOULOUMIAC, Pauline, GEC, Université de Cergy-Pontoise, 5, mail Gay Lussac, Neuville-sur-Oise, Cergy-Pontoise, 95031, France, nadaya.cubas@upmc.fr
    4:40 PM
    TOWARDS A SYSTEMATIC CHARACTERIZATION OF CASCADIA UPPER PLATE MORPHOLOGY, STRUCTURE, AND QUATERNARY DEFORMATION HISTORY: AN INTEGRATED ONSHORE-OFFSHORE APPROACH (Invited Presentation)
    WATT, Janet T.1, BROTHERS, Daniel S.1, BENNETT, Scott E.K.2, KLUESNER, Jared W.1, ROLAND, Emily3, CONRAD, James E.1, SLITER, Ray W.1, DARTNELL, Peter1, GOLDFINGER, Chris4, PATTON, Jason R.5, MICHALAK, Melanie J.5, SHERROD, Brian L.6, GOMBERG, Joan6 and WELLS, Ray E.7, (1)U.S. Geological Survey, Pacific Coastal and Marine Science Center, 2885 Mission Street, Santa Cruz, CA 95060, (2)Geology, Minerals, Energy, and Geophysics Science Center, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, (3)University of Washington, School of Oceanography, Box 357940, Seattle, WA 98195, (4)College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Ocean Admin Bldg 104, Corvallis, OR 97331, (5)Department of Geology, Humboldt State University, 1 Harpst St, Arcata, CA 95521, (6)Earthquake Science Center, U.S. Geological Survey, University of Washington, Box 351310, Seattle, WA 98195, (7)GMEG at Oregon Water Science Center, US Geological Survey, 2130 SW 5th Ave., Portland, OR 97201, jwatt@usgs.gov
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