Major magnitude 7.1 earthquake - Bering Sea, 36 mi northwest of Atka, Aleutians West County, Alaska, USA, on Saturday, 28 February 1970 at 10:52 (GMT)

Major magnitude 7.1 earthquake - Bering Sea, 36 mi northwest of Atka, Aleutians West County, Alaska, USA, on Saturday, 28 February 1970 at 10:52 (GMT)

Major magnitude 7.1 earthquake at 164 km depth

Date & time: 28 Feb 1970 10:52:33 UTC
Magnitude: 7.1
Depth: 164.1 km
Epicenter latitude / longitude: 52.487°N / 174.915°W (Bering Sea, Alaska, United States)
Nearest volcano: Koniuji (33 km / 21 mi)
Nearby towns and cities:
58 km (36 mi) WNW of Atka (pop: 64) --> See nearby quakes!
136 km (84 mi) ENE of Adak (pop: 332) --> See nearby quakes!
411 km (255 mi) W of Nikolski (pop: 18) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.8 x 1015 joules (783 gigawatt hours, equivalent to 6.7 x 105 tons of TNT or 42.1 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 7.1164 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 (7 quakes):
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Earlier earthquakes in the same area

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