Tsunami Predictions for the Coast of Alaska Kodiak Island to Ketchikan.

The 100- and 500-year combined tsunami and tide elevations were predicted at sites along the coast of Alaska between Kodiak Island and Ketchikan. Lack of historical data at most sites necessitated the generation of a synthetic record of tsunami activity in the Gulf of Alaska. The geophysical and tec...

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Bibliographic Details
Main Author: Crawford,Peter L
Other Authors: COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS
Format: Text
Language:English
Published: 1987
Subjects:
Physical and Dynamic Oceanography
*OCEAN WAVES
ALEUTIAN ISLANDS
TRENCHES
DEFORMATION
GEOPHYSICS
TECTONICS
ALASKA GULF
OCEAN BOTTOM
ELEVATION
TIDES
COASTAL REGIONS
ALASKA
ASTRONOMY
GULFS
MATHEMATICAL MODELS
EARTHQUAKES
SUBMARINE TRENCHES
MATHEMATICAL PREDICTION
*Tsunamis
Gage
Gulf of Alaska
Ketchikan
Kodiak
Alaska
Aleutian Islands
Online Access:http://www.dtic.mil/docs/citations/ADA181775
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA181775
Description
Summary:The 100- and 500-year combined tsunami and tide elevations were predicted at sites along the coast of Alaska between Kodiak Island and Ketchikan. Lack of historical data at most sites necessitated the generation of a synthetic record of tsunami activity in the Gulf of Alaska. The geophysical and tectonic setting of the Gulf were used to synthesize a record of tsuamigenic, tectonic deformations of the seafloor. A numerical model was used to simulate the tsunamis resulting from each deformation. Numerical simulations of the 1964 Alaskan tsunami were made and compared with historical tide gage recordings. Historical data of tsunami activity along the entire Aleutian trench were used to assign probability of occurence to each tsunami in the synthetic record. A numerical procedure was used to combine the effects of astronomical tides and tsunamis and to produce to 100- and 500-year combined tsunami and tide elevations. (Author)

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