Very strong mag. 6.5 earthquake - North Pacific Ocean, 114 mi south of Unalaska, Aleutians West (CA) County, Alaska, USA, on Friday, 19 April 1957 at 22:19 (GMT)
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Very strong magnitude 6.5 earthquake at 15 km depth
Date & time: 19 Apr 1957 22:19:32 UTC
Depth: 14.5 km
Epicenter latitude / longitude: 52.227°N / 166.354°W (North Pacific Ocean, Alaska, United States)
Nearest volcano: Okmok (178 km / 111 mi)
Nearby towns and cities:
184 km (114 mi) S of Unalaska (pop: 4,490) --> See nearby quakes!
187 km (116 mi) ESE of Nikolski (pop: 18) --> See nearby quakes!
216 km (134 mi) S of Akutan (pop: 1,040) --> See nearby quakes!
351 km (218 mi) SW of False Pass (pop: 40) --> See nearby quakes!
407 km (253 mi) SW of Cold Bay (pop: 123) --> See nearby quakes!
412 km (256 mi) SW of King Cove (pop: 1,010) --> See nearby quakes!
517 km (321 mi) SW of Sand Point (pop: 1,060) --> See nearby quakes!
537 km (334 mi) SW of Nelson Lagoon (pop: 52) --> 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
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.
|M 6.5||15 km||Fox Islands, Aleutian Islands, Alaska (USA)||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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More infoRecorded aftershocks, latest first (1 quakes):
- 29 Jun 1957 07:48 UTC| M 5.8 |20 km (12.4 mi) depth|89 km (55 mi) distance| USGS | Details