How are maximum expected wave heights determined for a specific location?
• In areas where the maximum potential source is known (e.g., areas with an active subduction zone offshore), tsunami generation, propagation, and runup can be mathematically modeled and maximum wave heights estimated. Or, if the areas largest expected earthquake has occurred in recorded times, the historical records can be used to constrain expectations. • In areas where the maximum potential source is unknown and no historic events have occurred (e.g., parts of the U.S. Atlantic coast), maximum expected wave height is difficult to determine. Many potential sources must be considered to determine the maximum expectations. • The National Tsunami Hazard Mitigation Program (http://www.pmel.noaa.gov/tsunami-hazard/) has funded hazard assessment investigations for many west coast, Alaska, and Hawaii communities. The process will be extended to the Atlantic coast. The WC/ATWC is presently performing preliminary studies on U.S. Atlantic and Gulf coast hazard.
