Robert Witter
U.S.G.S., Anchorage, AK
Activity
2024
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SEDIMENT AND MICROFOSSIL MARKERS OF TSUNAMI INUNDATION EXTENT FOLLOWING THE GREAT CA. 1700 CE EARTHQUAKE AT THE SALMON RIVER ESTUARY, OREGON, USA
T13 Coastal and Shallow Marine Sediments as Archives of Extreme Events.Sunday, 22 September 20248:00 AM - 12:00 PM210D
2021
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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
T231 Cascadia Subduction Zone Earthquakes: Geologic, Geophysical, and Modeling Constraints on Rupture Timing and ProcessWednesday, 13 October 20211:30 PM - 5:30 PMPortland Ballroom 257 (Hybrid Room)
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CONSTRAINTS ON EARTHQUAKE SOURCE MODELS OF THE 1700 CE TSUNAMI: MAPPING AND SEDIMENT TRANSPORT MODELING OF TSUNAMI DEPOSITS IMPLY >1 M OF MEGATHRUST COSEISMIC SUBSIDENCE AT THE SALMON RIVER, OR
T211 Geoscience Approaches to Interpreting Coastal Records of Earthquakes, Tsunamis, and StormsWednesday, 13 October 20218:00 AM - 12:00 PMB113/B114 (Hybrid Room)
2020
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THE APPLICATION OF DIATOM ANALYSIS TO RECONSTRUCT COSEISMIC UPLIFT ON MONTAGUE ISLAND, ALASKA
T225 Building the SZ4D Faulting and Earthquake Cycles Theme: What Controls Strain Accumulation and Release at Subduction Zones?Thursday, 29 October 20205:30 PM - 8:00 PMMeeting Rooms
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LIMITS OF PRIOR MEGATHRUST RUPTURE FROM STRATIGRAPHIC AND MICROFOSSIL OBSERVATIONS AT SITKALIDAK ISLAND, AK
T225 Building the SZ4D Faulting and Earthquake Cycles Theme: What Controls Strain Accumulation and Release at Subduction Zones?Thursday, 29 October 20205:30 PM - 8:00 PMMeeting Rooms
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INVESTIGATING THE ROLE OF UPPER-PLATE FAULTS IN SOUTHERN CASCADIA: A PALEOSEISMIC INVESTIGATION OF THE LITTLE SALMON FAULT AND GOOSE LAKE FAULT, HYDESVILLE, HUMBOLDT COUNTY, CALIFORNIA
20 D7. Paleoearthquake Records and Slip Rates Across the Southern California Plate Boundary (Posters)Wednesday, 13 May 20209:00 AM - 6:00 PMFountain Ballroom
2018
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LIDAR-BASED MAPS OF ACTIVE TRACES OF THE FAIRWEATHER FAULT IN GLACIER BAY NATIONAL PARK, ALASKA
T98 High-Resolution Datasets for Fluvial and Hillslope Processes and Landforms: Frontiers of Remotely Sensed Data (Posters)Monday, 5 November 20189:00 AM - 6:30 PMHalls J-K
2017
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AN INCOMPLETE HISTORY OF LATE HOLOCENE GREAT EARTHQUAKES AT THE NEHALEM RIVER ESTUARY, CENTRAL CASCADIA SUBDUCTION ZONE
T161 Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami Hazards (Posters)Monday, 23 October 20179:00 AM - 6:30 PMHalls 4EF
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DIATOM VARIABILITY IN TIDAL-MARSH ENVIRONMENTS: IMPLICATIONS FOR CONSTRAINING LAND-LEVEL CHANGE FROM CASCADIA SUBDUCTION ZONE EARTHQUAKES
T161 Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami Hazards (Posters)Monday, 23 October 20179:00 AM - 6:30 PMHalls 4EF
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THE RESPONSE OF FORAMINIFERA TO THE TIDAL RESTORATION OF THE BANDON MARSH (OREGON) - IMPLICATIONS FOR SUBSIDENCE ESTIMATES DURING PAST EARTHQUAKES
T161 Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami Hazards (Posters)Monday, 23 October 20179:00 AM - 6:30 PMHalls 4EF
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THE TIMING AND DEFORMATION OF CASCADIA SUBDUCTION ZONE EARTHQUAKES FROM COASTAL MARSH RECORDS OF OREGON
T58 Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami HazardsSunday, 22 October 20171:30 PM - 5:30 PMYakima 1
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MICROFOSSIL MEASURES OF SUBSIDENCE DURING PAST PLATE-BOUNDARY EARTHQUAKES: THEIR ACCURACY REVEALED BY A SUDDEN TIDAL-FLOODING EXPERIMENT IN CASCADIA
T58 Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami HazardsSunday, 22 October 20171:30 PM - 5:30 PMYakima 1
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INTER- AND INTRA-SITE VARIABILITY OF COSEISMIC SUBSIDENCE ESTIMATES FROM NORTHERN HUMBOLDT BAY, CALIFORNIA
T58 Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami HazardsSunday, 22 October 20171:30 PM - 5:30 PMYakima 1
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ASSESSING THE UTILITY OF δ13C AND BULK GEOCHEMISTRY IN ESTUARIES ALONG THE CASCADIA SUBDUCTION ZONE FOR COASTAL PALEOSEISMOLOGY
T58 Characterizing Cascadia’s Earthquakes—Reexamining Open Questions about Cascadia Seismic and Tsunami HazardsSunday, 22 October 20171:30 PM - 5:30 PMYakima 1
2016
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A SYNTHESIS OF CHARACTERISTICS OF SUBMARINE LANDSLIDES GENERATED BY THE 1964 GREAT ALASKA EARTHQUAKE IN SEVEN FJORDS
271 New Research in Coastal EnvironmentsWednesday, 28 September 20168:00 AM - 12:00 PMRoom 207
2015
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REPEATED TSUNAMIS DURING THE LAST 4000 YEARS AT SANAK ISLAND, ALASKA
T197 Coastal Hazards from Minutes to MillenniaTuesday, 3 November 20158:00 AM - 12:00 PMRoom 307
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AMS 14C TESTS OF CORRELATIONS OF GREAT EARTHQUAKES ALONG THE CASCADIA SUBDUCTION ZONE, COASTAL OREGON
T134 Coastal Hazards from Minutes to Millennia (Posters)Monday, 2 November 20159:00 AM - 6:30 PMExhibit Hall
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STRATIGRAPHIC AND MICROFOSSIL EVIDENCE FOR THREE CASCADIA SUBDUCTION ZONE EARTHQUAKES AT JACOBY CREEK, ARCATA BAY, CALIFORNIA, USA
T134 Coastal Hazards from Minutes to Millennia (Posters)Monday, 2 November 20159:00 AM - 6:30 PMExhibit Hall
2014
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THE NATURE OF CASCADIA SUBDUCTION ZONE EARTHQUAKE CYCLES DRAWN FROM COASTAL PALEOSEISMOLOGY
178 Great Earthquakes, the Cascadia Subduction Zone, and Society ITuesday, 21 October 20148:00 AM - 12:00 PMBallroom A
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RECENT COMPREHENSIVE TSUNAMI MODELING FOR COASTAL OREGON
239 Great Earthquakes, the Cascadia Subduction Zone, and Society IITuesday, 21 October 20141:00 PM - 5:00 PMBallroom A
2012
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LITTLE STRAIN ACCUMULATION AND RELEASE ON THE ALASKA-ALEUTIAN MEGATHRUST BENEATH THE SHUMAGIN ISLANDS IN THE LAST 3400 YEARS?
T164 Geological Records of Earthquakes and Tsunamis on Passive and Active Margins Coasts (Posters)Tuesday, 6 November 20129:00 AM - 6:00 PMHall B
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GRAIN SIZE CHARACTERISTICS OF TIDAL MARSHES DURING A SIMULATED MEGATHRUST EARTHQUAKE AT BANDON, OREGON
T164 Geological Records of Earthquakes and Tsunamis on Passive and Active Margins Coasts (Posters)Tuesday, 6 November 20129:00 AM - 6:00 PMHall B
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SEDIMENTARY AND FORAMINIFERAL EVIDENCE OF THE 2011 TOHOKU-OKI TSUNAMI ON THE SENDAI COASTAL PLAIN, JAPAN
T119 Geological Records of Earthquakes and Tsunamis on Passive and Active Margins CoastsMonday, 5 November 20121:30 PM - 5:30 PM207D