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Historic Earthquakes

Prince William Sound, Alaska
1964 March 28 03:36 UTC
1964 March 27 05:36 p.m. local time
Magnitude 9.2

Largest Earthquake in Alaska

Isoseismal Map

Isoseismals are based on intensity estimates from data.

Isoseismal Map

Abridged from Seismicity of the United States, 1568-1989 (Revised), by Carl W. Stover and Jerry L. Coffman, U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, Washington: 1993.