Tsunami Predictions for the Coast of Alaska Kodiak Island to Ketchikan.
Abstract
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1987
- Accession Number
- ADA181775
Entities
People
- Peter L. Crawford
Organizations
- Coastal Engineering Research Center