Type 19 Flood Insurance Study: Tsunami Predictions for Southern California.
Abstract
Calculations of shoreline elevations due to tsunamis of distant origin were made for the southern California region. Elevations were determined that were expected to be equaled or exceeded on the average of once per 100 or once per 500 yr. In addition, exceedance frequency distributions for arbitrary frequencies of occurrence were presented. Historical data of tsunami activity in distant generation regions were used in the investigation in conjunction with numerical models that generated tsunamis and propagated them across the deep-ocean and nearshore region. The combined effects of the astronomical tides and tsunamis were incorporated in the analysis. Numerical simulations of the 1964 Alaskan tsunami in southern California were performed and comparisons with historical tide gage recordings were presented. Tsunami elevation predictions based upon the methods presented in the investigation were shown to be in good agreement with predictions based solely upon historical data of tsunami activity (at the limited number of locations in southern California with sufficient historical data to allow reasonable predictions to be made).
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA091657
Entities
People
- James R. Houston