"The U.S. West Coast/Alaska Tsunami Warning Center (WC/ATWC) was established in Palmer, Alaska in 1967 as a direct result of the great Alaskan earthquake that occurred in Prince William Sound on 27 March 1964. This earthquake alerted State and Federal officials to the need for a facility to provide timely and effective tsunami warnings and information for the coastal areas of Alaska. In 1982 the WC/ ATWC's area of responsibility (AOR) was enlarged to include the issuing of tsunami warnings to California, Oregon, Washington, and British Columbia, for potential tsunamigeuic Earthquakes occurring in their coastal areas. In 1996 the responsibility was again expanded to include all Pacific-wide tsunamigenic sources which could affect the California, Oregon, Washington, British Columbia, and Alaska coasts."
Historical Archive Site for The National Tsunami Hazard Mitigation Program: http://nthmp-history.pmel.noaa.gov/
ITS 2001 Proceedings, NTHMP Review Session, Paper R-23