Major magnitude 8.6 earthquake - Bering Sea, 27 mi southeast of Anagaksik Island, Aleutians West County, Alaska, USA, on Saturday, 9 March 1957 at 14:22 (GMT)

Major magnitude 8.6 earthquake - Bering Sea, 27 mi southeast of Anagaksik Island, Aleutians West County, Alaska, USA, on Saturday, 9 March 1957 at 14:22 (GMT)

Major magnitude 8.6 earthquake at 25 km depth

Date & time: 9 Mar 1957 14:22:33 UTC
Magnitude: 8.6
Depth: 25.0 km
Epicenter latitude / longitude: 51.499°N / 175.626°W (Bering Sea, Alaska, United States)
Nearest volcano: Great Sitkin (73 km / 45 mi)
Nearby towns and cities:
81 km (50 mi) ESE of Adak (pop: 332) --> See nearby quakes!
125 km (78 mi) SW of Atka (pop: 64) --> 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 8.625 kmAndreanof Islands, Aleutian Islands, 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.
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Aftershocks

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Recorded aftershocks, latest first (147 quakes):
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Earlier earthquakes in the same area

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