Strong mag. 5.6 earthquake - North Pacific Ocean, 39 mi south of Nikolski, Aleutians West (CA) County, Alaska, USA, on Monday, 29 April 1957 at 04:30 (GMT)
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Strong magnitude 5.6 earthquake at 25 km depth
Date & time: 29 Apr 1957 04:30:09 UTC
Depth: 25.0 km
Epicenter latitude / longitude: 52.371°N / 168.916°W (North Pacific Ocean, Alaska, United States)
Nearest volcano: Tana (77 km / 48 mi)
Nearby towns and cities:
63 km (39 mi) S of Nikolski (pop: 18) --> See nearby quakes!
231 km (143 mi) SW of Unalaska (pop: 4,490) --> See nearby quakes!
286 km (178 mi) SW of Akutan (pop: 1,040) --> See nearby quakes!
360 km (224 mi) E of Atka (pop: 64) --> See nearby quakes!
456 km (283 mi) SW of False Pass (pop: 40) --> See nearby quakes!
513 km (319 mi) SW of Cold Bay (pop: 123) --> See nearby quakes!
527 km (327 mi) WSW of King Cove (pop: 1,010) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.6 x 1013 joules (4.4 gigawatt hours, equivalent to 3788 tons of TNT or 0.2 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 5.6||25 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 (2 quakes):
- 02 May 1957 11:38 UTC| M 6.3 |26 km (16.2 mi) depth|17 km (11 mi) distance| USGS | Very strong mag. 6.3 earthquake - North Pacific Ocean, 33 mi south of Nikolski, Aleutians West (CA) County, Alaska, USA, on Thursday, 2 May 1957 at 11:38 (GMT)
- 02 May 1957 11:29 UTC| M 6.3 |30 km (18.6 mi) depth|18 km (11 mi) distance| USGS | Very strong mag. 6.3 earthquake - North Pacific Ocean, 32 mi south of Nikolski, Aleutians West (CA) County, Alaska, USA, on Thursday, 2 May 1957 at 11:29 (GMT)