Great magnitude 8.6 earthquake - North Pacific Ocean, 3968 mi northwest of Washington DC, Washington County, District of Columbia, USA, on Monday, 1 April 1946 at 12:29 (GMT)

Great magnitude 8.6 earthquake - North Pacific Ocean, 3968 mi northwest of Washington DC, Washington County, District of Columbia, USA, on Monday, 1 April 1946 at 12:29 (GMT)

Great magnitude 8.6 earthquake at 15 km depth

Date & time: 1 Apr 1946 12:29:01 UTC
Magnitude: 8.6
Depth: 15.0 km
Epicenter latitude / longitude: 53.492°N / 162.832°W (North Pacific Ocean, Alaska, United States)
Nearest volcano: Isanotski (153 km / 95 mi)
Nearby towns and cities:
156 km (97 mi) SSE of False Pass (pop: 40) --> See nearby quakes!
178 km (110 mi) S of King Cove (pop: 1,010) --> See nearby quakes!
189 km (117 mi) S of Cold Bay (pop: 123) --> See nearby quakes!
206 km (128 mi) ESE of Akutan (pop: 1,040) --> See nearby quakes!
248 km (154 mi) E of Unalaska (pop: 4,490) --> See nearby quakes!
255 km (158 mi) SW of Sand Point (pop: 1,060) --> See nearby quakes!
298 km (185 mi) SSW of Nelson Lagoon (pop: 52) --> See nearby quakes!
358 km (223 mi) SW of Perryville (pop: 113) --> See nearby quakes!
6385 km (3968 mi) NW of Washington (District of Columbia) (pop: 601,700) --> See nearby quakes!
6385 km (3968 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5 x 1017 joules (1.4 x 105 gigawatt hours, equivalent to 1.2 x 108 tons of TNT or 7486.7 atomic bombs!) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
MagnitudeDepthLocationSource
M 8.615 km1946 Aleutian Islands (Unimak Island) Earthquake, Alaska (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
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Aftershocks of the 8.6 quake North Pacific Ocean, 3968 mi northwest of Washington DC, Washington County, District of Columbia, USA, 1 April 1946 12:29 GMT

More info
Recorded aftershocks, latest first (29 quakes):
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Earlier earthquakes in the same area

Great magnitude 8.6 earthquake - North Pacific Ocean, 3968 mi northwest of Washington DC, Washington County, District of Columbia, USA, on Monday, 1 April 1946 at 12:29 (GMT)
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