Confidence levels for tsunami-inundation limits in northern Oregon inferred from a 10,000-year history of great earthquakes at the Cascadia subduction zone

2009 ◽  
Vol 54 (1) ◽  
pp. 27-73 ◽  
Author(s):  
George R. Priest ◽  
Chris Goldfinger ◽  
Kelin Wang ◽  
Robert C. Witter ◽  
Yinglong Zhang ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Tsunami Inundation ◽  
Confidence Levels ◽  
Great Earthquakes ◽  
History Of

AN INCOMPLETE HISTORY OF LATE HOLOCENE GREAT EARTHQUAKES AT THE NEHALEM RIVER ESTUARY, CENTRAL CASCADIA SUBDUCTION ZONE

2017 ◽  
Author(s):  
Alan R. Nelson ◽  
◽  
Yuki Sawai ◽  
Andrea D. Hawkes ◽  
Simon E. Engelhart ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Late Holocene ◽  
River Estuary ◽  
Cascadia Subduction Zone ◽  
Great Earthquakes ◽  
History Of

Tsunami Inundation from Great Earthquakes on the Cascadia Subduction Zone along the Northern California Coast

2008 ◽  
Author(s):  
Burak Uslu ◽  
Jose C. Borrero ◽  
Lori Dengler ◽  
Costas E. Synolakis ◽  
Aggeliki Barberopoulou
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Northern California ◽  
Tsunami Inundation ◽  
California Coast ◽  
Great Earthquakes

Tsunami history of an Oregon coastal lake reveals a 4600 yr record of great earthquakes on the Cascadia subduction zone

2005 ◽  
Vol 117 (7) ◽  
pp. 1009 ◽  
Author(s):  
Harvey M. Kelsey ◽  
Alan R. Nelson ◽  
Eileen Hemphill-Haley ◽  
Robert C. Witter
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Coastal Lake ◽  
Great Earthquakes ◽  
History Of

Simulation of Tsunamis from Great Earthquakes on the Cascadia Subduction Zone

Science ◽  
1990 ◽  
Vol 250 (4985) ◽  
pp. 1248-1251 ◽  
Author(s):  
M. K.-F. Ng ◽  
P. H. Leblond ◽  
T. S. Murty
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Great Earthquakes

Stratigraphic and microfossil evidence for a 4500-year history of Cascadia subduction zone earthquakes and tsunamis at Yaquina River estuary, Oregon, USA

2014 ◽  
Vol 127 (1-2) ◽  
pp. 211-226 ◽  
Author(s):  
Nicholas A. Graehl ◽  
Harvey M. Kelsey ◽  
Robert C. Witter ◽  
Eileen Hemphill-Haley ◽  
Simon E. Engelhart
Keyword(s):  
Subduction Zone ◽  
River Estuary ◽  
Cascadia Subduction Zone ◽  
History Of ◽  
Subduction Zone Earthquakes

Households’ Intended Evacuation Transportation Behavior in Response to Earthquake and Tsunami Hazard in a Cascadia Subduction Zone City

2020 ◽  
Vol 2674 (7) ◽  
pp. 99-114
Author(s):  
Chen Chen ◽  
Alexandra Buylova ◽  
Cadell Chand ◽  
Haizhong Wang ◽  
Lori A. Cramer ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Perceived Risk ◽  
Motor Vehicle ◽  
Cascadia Subduction Zone ◽  
Tsunami Inundation ◽  
Traffic Conditions ◽  
Community Tenure ◽  
Local Residents ◽  
Transportation Behavior ◽  
The City

Earthquakes along the Cascadia subduction zone would generate a local tsunami that could arrive at coastlines within minutes. Few studies provide empirical evidence to understand the potential behaviors of local residents during this emergency. To fill this knowledge gap, this study examines residents’ perceptions and intended evacuation behaviors in response to an earthquake and tsunami, utilizing a survey sent to households in Seaside, OR. The results show that the majority of respondents can correctly identify whether their house is inside or outside a tsunami inundation zone. Older respondents are more likely to identify this correctly regardless of any previous disaster evacuation experience or community tenure. The majority of respondents (69%) say they would evacuate in the event of a tsunami. Factors influencing this choice include age, motor ability, access to transportation, and trust in infrastructure resiliency or traffic conditions. While the City of Seaside actively promotes evacuation by foot, 38% of respondents still state they would use a motor vehicle to evacuate. Females and older respondents are more likely to evacuate by foot. Respondents with both higher confidence in their knowledge of disaster evacuation and higher income are more likely to indicate less time needed to evacuate than others. Generally, respondents are more likely to lead rather than follow during an evacuation, especially respondents who report being more prepared for an evacuation and who have a higher perceived risk. This study showcases a unique effort at empirically analyzing human tsunami evacuation lead or follow choice behavior.

Great earthquakes of variable magnitude at the Cascadia subduction zone

2006 ◽  
Vol 65 (3) ◽  
pp. 354-365 ◽  
Author(s):  
Alan R. Nelson ◽  
Harvey M. Kelsey ◽  
Robert C. Witter
Keyword(s):  
Subduction Zone ◽  
Plate Boundary ◽  
Conclusive Evidence ◽  
Cascadia Subduction Zone ◽  
Radiocarbon Age ◽  
Rupture Length ◽  
Great Earthquakes ◽  
Varying Length ◽  
Recurrence Intervals ◽  
Coseismic Subsidence

AbstractComparison of histories of great earthquakes and accompanying tsunamis at eight coastal sites suggests plate-boundary ruptures of varying length, implying great earthquakes of variable magnitude at the Cascadia subduction zone. Inference of rupture length relies on degree of overlap on radiocarbon age ranges for earthquakes and tsunamis, and relative amounts of coseismic subsidence and heights of tsunamis. Written records of a tsunami in Japan provide the most conclusive evidence for rupture of much of the plate boundary during the earthquake of 26 January 1700. Cascadia stratigraphic evidence dating from about 1600 cal yr B.P., similar to that for the 1700 earthquake, implies a similarly long rupture with substantial subsidence and a high tsunami. Correlations are consistent with other long ruptures about 1350 cal yr B.P., 2500 cal yr B.P., 3400 cal yr B.P., 3800 cal yr B.P., 4400 cal yr B.P., and 4900 cal yr B.P. A rupture about 700–1100 cal yr B.P. was limited to the northern and central parts of the subduction zone, and a northern rupture about 2900 cal yr B.P. may have been similarly limited. Times of probable short ruptures in southern Cascadia include about 1100 cal yr B.P., 1700 cal yr B.P., 3200 cal yr B.P., 4200 cal yr B.P., 4600 cal yr B.P., and 4700 cal yr B.P. Rupture patterns suggest that the plate boundary in northern Cascadia usually breaks in long ruptures during the greatest earthquakes. Ruptures in southernmost Cascadia vary in length and recurrence intervals more than ruptures in northern Cascadia.

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