M 6.9 - 275 km SE of Atka, Alaska
- 1966-08-07 02:13:04 (UTC)
- 50.513°N 171.301°W
- 19.7 km depth
Maximum observed Modified Mercalli Intensity (MMI) I
Felt on Adak Island.
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.