Very strong mag. 6.4 earthquake - North Pacific Ocean, 139 mi southwest of Unalaska, Aleutians West (CA) County, Alaska, USA, on Friday, 21 December 1962 at 08:42 (GMT)
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Very strong magnitude 6.4 earthquake at 21 km depth
Date & time: 21 Dec 1962 08:42:48 UTC
Magnitude: 6.4
Depth: 20.6 km
Epicenter latitude / longitude: 52.256°N / 168.532°W
(North Pacific Ocean, Alaska, United States)Nearest volcano: Vsevidof (98 km / 61 mi)
Nearby towns and cities:
79 km (49 mi) SSE of Nikolski (pop: 18) --> See nearby quakes!
224 km (139 mi) SW of Unalaska (pop: 4,490) --> See nearby quakes!
278 km (173 mi) SW of Akutan (pop: 1,040) --> See nearby quakes!
386 km (240 mi) E of Atka (pop: 64) --> See nearby quakes!
445 km (276 mi) SW of False Pass (pop: 40) --> See nearby quakes!
502 km (312 mi) SW of Cold Bay (pop: 123) --> See nearby quakes!
515 km (320 mi) SW of King Cove (pop: 1,010) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 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.
| Magnitude | Depth | Location | Source |
| M 6.4 | 21 km | Fox Islands, Aleutian Islands, Alaska (USA) | USGS |
User reports for this quake
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Aftershocks
More info
Recorded aftershocks, latest first (3 quakes):- 22 Dec 1962 15:20 UTC| M 6.5 |33.3 km (20.7 mi) depth|19 km (12 mi) distance| USGS | Very strong mag. 6.5 earthquake - North Pacific Ocean, 150 mi southwest of Unalaska, Aleutians West (CA) County, Alaska, USA, on Saturday, 22 December 1962 at 15:20 (GMT)
- 21 Dec 1962 09:10 UTC| M 6.5 |25 km (15.5 mi) depth|13 km (8 mi) distance| USGS | Very strong mag. 6.5 earthquake - North Pacific Ocean, 136 mi southwest of Unalaska, Aleutians West (CA) County, Alaska, USA, on Friday, 21 December 1962 at 09:10 (GMT)
- 21 Dec 1962 09:00 UTC| M 6.2 |33 km (20.5 mi) depth|16 km (10 mi) distance| USGS | Strong mag. 6.2 earthquake - North Pacific Ocean, 40 mi southeast of Nikolski, Aleutians West (CA) County, Alaska, USA, on Friday, 21 December 1962 at 09:00 (GMT)
Earlier earthquakes in the same area
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