Very strong mag. 6.5 earthquake - North Pacific Ocean, 27 mi southeast of Tigalda Island, Aleutians East County, Alaska, USA, on Wednesday, 30 October 1946 at 07:47 (GMT)

Very strong mag. 6.5 earthquake - North Pacific Ocean, 27 mi southeast of Tigalda Island, Aleutians East County, Alaska, USA, on Wednesday, 30 October 1946 at 07:47 (GMT)

Very strong magnitude 6.5 earthquake at 30 km depth

Date & time: 30 Oct 1946 07:47:37 UTC
Magnitude: 6.5
Depth: 30.0 km
Epicenter latitude / longitude: 53.795°N / 164.628°W (North Pacific Ocean, Alaska, United States)
Nearest volcano: Westdahl (80 km / 50 mi)
Nearby towns and cities:
84 km (52 mi) ESE of Akutan (pop: 1,040) --> See nearby quakes!
125 km (78 mi) E of Unalaska (pop: 4,490) --> See nearby quakes!
142 km (88 mi) SW of False Pass (pop: 40) --> See nearby quakes!
198 km (123 mi) SW of Cold Bay (pop: 123) --> See nearby quakes!
205 km (128 mi) SW of King Cove (pop: 1,010) --> See nearby quakes!
297 km (184 mi) ENE of Nikolski (pop: 18) --> See nearby quakes!
317 km (197 mi) WSW of Sand Point (pop: 1,060) --> See nearby quakes!
329 km (204 mi) SW of Nelson Lagoon (pop: 52) --> See nearby quakes!
422 km (263 mi) WSW of Perryville (pop: 113) --> See nearby quakes!
463 km (288 mi) SW of Chignik Lake (pop: 73) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 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 6.530 kmUnimak Island region, Alaska (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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Aftershocks

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Recorded aftershocks, latest first (0 quakes):
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Earlier earthquakes in the same area

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