2003 Seattle Annual Meeting (November 2–5, 2003)

Session No. 183
Tuesday, 4 November 2003: 1:30 PM-5:30 PM

T150. New Views of Seismic Hazard in Cascadia I: Seismology and Seismotectonics II

GSA Geophysics Division

 

Thomas M. Brocher, Kate C. Miller and Samuel Y Johnson, Advocates
Paper #
Start Time
1
1:30 PM
LANDWARD LIMIT OF COSEISMIC SLIP IN GREAT SUBDUCTION ZONE EARTHQUAKES - IMPLICATIONS FOR GREAT EARTHQUAKES IN CASCADIA
WELLS, Ray E., U.S. Geol Survey, 345 Middlefield Rd MS 973, Menlo Park, CA 94025, BLAKELY, Richard J., U.S. Geol Survey, MS 989, 345 Middlefield Road, Menlo Park, CA 94025-3591, SUGIYAMA, Yuichi, National Institute of Advanced Industrial Sci and Technology, 1-1-3 Higashi, Tsukuba, Ibaraki, 305-8567, Japan, SCHOLL, David W., U.S. Geol Survey, 345 Middlefield Rd, MS 999, Menlo Park, CA 94025 and DINTERMAN, Philip A., U.S. Geol Survey, 345 Middlefield Rd, Menlo Park, CA 94025, rwells@usgs.gov, rwells@usgs.gov
2
1:45 PM
COSEISMIC SUBSIDENCE IN THE 1700 GREAT CASCADIA EARTHQUAKE: CONSTRAINT ON THE RUPTURE AREA
LEONARD, Lucinda J., School of Earth and Ocean Sciences, Univ of Victoria, Victoria, BC V8W3P6, Canada, HYNDMAN, Roy D., Pacific Geoscience Centre, 9860 West Saanich Road, Sidney, BC V8L 4B2 and MAZZOTTI, Stephane, Pacific Geoscience Centre, 9860 West Saanich Road, Sidney, BC V8L 4B2, Canada, lucindal@uvic.ca, lucindal@uvic.ca
3
2:00 PM
THE 1700 CASCADIA TSUNAMI INITIATED A FATAL SHIPWRECK IN JAPAN
ATWATER, Brian F., U.S. Geol Survey, Department of Earth and Space Sciences, Box 351310, University of Washington, Seattle, WA 98195-1310 and SATAKE, Kenji, Active Fault Research Center, AIST, 1-1-1 Higashi, Site C7, Tsukuba, 305-8567, Japan, atwater@u.washington.edu, atwater@u.washington.edu
4
2:15 PM
BURIED SOILS, TREE RINGS, AND OLD MAPS SUGGEST THAT THE 1960 CHILE EARTHQUAKE WAS LARGER THAN ITS PREDECESSORS OF 1837 AND 1737
CISTERNAS, Marco, Agronomy Faculty, Catholic University of Valparaiso, San Francisco s/n, La Palma, Quillota, ATWATER, Brian, U.S. Geological Survey at Department of Earth and Space Sciences, Univ of Washington, Seattle, WA 98195-1310, Seattle, WA, MACHUCA, Gonzalo, Department of Historical & Social Sciences, Univ of Concepcion, Barrio Universitario s/n, Concepcion and LAGOS, Marcelo, Institute of Geography, Catholic Univ of Chile, Av. Vicuña Mackenna 4860, Santiago, Chile, marco.cisternas@ucv.cl, marco.cisternas@ucv.cl
5
2:30 PM
MECHANICAL MODEL FOR THE CASCADIA SUBDUCTION WEDGE, FOREARC BASINS AND MEGATHRUST EARTHQUAKES
WILLETT, Sean D.1, BRANDON, Mark2 and FULLER, Christopher1, (1)Department of Earth and Space Sciences, Univ of Washington, Seattle, WA 98195, (2)Geology & Geophysics, Yale University, New Haven, CT 06520, swillett@u.washington.edu, swillett@u.washington.edu
6
2:45 PM
THE INFLUENCE OF SEDIMENTARY BASINS ON GROUND SHAKING IN THE PUGET LOWLAND, WASHINGTON STATE
PRATT, Thomas L., U.S. Geol Survey, School of Oceanography, University of Washington, Seattle, WA 98195, BROCHER, Thomas M., MS 977, US Geol Survey, 345 Middlefield Rd, Menlo Park, CA 94025-3561, LI, Qin, Department of Earth and Planetary Sciences, Univ. of WA, Seattle, WA 98195 and WILCOCK, William, School of Oceanography, Univ of WA, Box 357940, Seattle, WA 98195, tpratt@ocean.washington.edu, tpratt@ocean.washington.edu
7
3:00 PM
REINTERPRETATION OF THE SEATTLE UPLIFT, WASHINGTON, AS A PASSIVE ROOF DUPLEX
BROCHER, Thomas M., U.S. Geol Survey, MS 977, 345 Middlefield Road, Menlo Park, CA 94025-3591, BLAKELY, Richard J., U.S. Geol Survey, MS 989, 345 Middlefield Road, Menlo Park, CA 94025-3591 and WELLS, Ray E., U.S. Geol Survey, MS 973, 345 Middlefield Road, Menlo Park, CA 94025, brocher@usgs.gov, brocher@usgs.gov
 
3:15 PM
Break
8
3:30 PM
LANDFALL OF THE SEATTLE FAULT ZONE, WEST SEATTLE, WA
BOOTH, Derek B., TROOST, Kathy Goetz and SHIMEL, Scott A., Department of Earth and Space Sciences, Univ of Washington, Box 351310, Seattle, WA 98195, dbooth@u.washington.edu, dbooth@u.washington.edu
9
3:45 PM
A LATE HOLOCENE EARTHQUAKE ON CENTRAL WHIDBEY ISLAND: SURFACE FOLDING ABOVE A BLIND FAULT
KELSEY, Harvey M., Dept . of Geology, Humboldt State Univ, Arcata, CA 95521, SHERROD, Brian L., Dept. of Earth and Space Sciences, U.S. Geol Survey, Box 351310, University of Washington, Seattle, WA 98195 and JOHNSON, Samuel Y., U. S. Geological Survey, MS 966, Box 25046, Denver, CO 80225, hmk1@humboldt.edu, hmk1@humboldt.edu
10
4:00 PM
THE EVERETT FAULT: A NEWLY DISCOVERED LATE QUATERNARY FAULT IN NORTH-CENTRAL PUGET SOUND, WASHINGTON
MOLINARI, Mark P. and BURK, Robert L., URS Corporation, 1501 4th Avenue, Suite 1400, Seattle, WA 98101-1616, mark_molinari@urscorp.com, mark_molinari@urscorp.com
11
4:15 PM
EVIDENCE FOR ONE OR TWO LATE HOLOCENE EARTHQUAKES ON THE UTSALADY POINT FAULT, NORTHERN PUGET LOWLAND, WASHINGTON
JOHNSON, Samuel Y.1, NELSON, Alan R.2, PERSONIUS, Stephen F.3, WELLS, Ray E.4, KELSEY, Harvey M.5, SHERROD, Brian L.6, OKUMURA, Koji7, KOEHLER III, Richard8, WITTER, Robert C.9 and BRADLEY, Lee-Ann2, (1)U. S. Geological Survey, MS 966, Box 25046, Denver, CO 80225, (2)U.S. Geol Survey, MS 966, PO Box 25046, Denver, CO 80225-0046, (3)U.S. Geol Survey, Box 25046, MS 966, Denver Federal Center, Denver, CO 80225, (4)U.S. Geol Survey, 345 Middlefield Rd MS 973, Menlo Park, CA 94025, (5)Dept . of Geology, Humboldt State Univ, Arcata, CA 95521, (6)Dept. of Earth and Space Sciences, U.S. Geol Survey, Box 351310, University of Washington, Seattle, WA 98195, (7)Department of Geography, Hiroshima Univ, 1-2-3 Hagamiyama, Higashi-Hiroshima, 739-8522, Japan, (8)William Lettis and Associates, Inc, 17777 Botelho Drive, Suite 262, Walnut Creek, CA 94596, (9)William Lettis & Associates, Inc, 1777 Botelho Dr., Suite 262, Walnut Creek, CA 94596, sjohnson@usgs.gov, sjohnson@usgs.gov
12
4:30 PM
THE OLYMPIA STRUCTURE: RAMP OR DISCONTINUITY? NEW GRAVITY DATA PROVIDE MORE INFORMATION
MAGSINO, Sammantha1, SANGER, Elizabeth2, WALSH, Timothy J.3, PALMER, Stephen P.4 and BLAKELY, Richard J.2, (1)Division of Geology and Earth Resources, Department of Natural Resources, POB 47007, Olympia, WA 98504-7007, Afghanistan, (2)U.S. Geol Survey, 345 Middlefield Road, Menlo Park, CA 94025, (3)Division of Geology and Earth Resources, Department of Natural Resources, POB 47007, Olympia, WA 98504-7007, (4)Division of Geology and Earth Resources, Department of Nat Rscs, POB 47007, Olympia, WA 98504-7007, sammantha.magsino@wadnr.gov, sammantha.magsino@wadnr.gov
13
4:45 PM
WESTERN RAINIER SEISMIC ZONE AIRBORNE LASER SWATH MAPPING
HARDING, David J.1, HAUGERUD, Ralph A.2, JOHNSON, Samuel Y.3, SCOTT, Kevin M.4, WEAVER, Craig S.2, MARTINEZ, Diana M.5, ZEIGLER, John C.6 and LATYPOV, Damir6, (1)Geodynamics Branch, NASA Goddard Space Flight Ctr, Mail Code 921, Greenbelt, MD 20771, (2)United States Geol Survey, Seattle, WA, (3)United States Geol Survey, Denver, CO, (4)United States Geol Survey, Vancouver, WA, (5)Puget Sound Regional Council, Seattle, WA, (6)TerraPoint, LLC, Houston, TX, david.j.harding@nasa.gov, david.j.harding@nasa.gov
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