Mag. 3.4 earthquake - Gulf of Alaska, 37 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 21:51 (GMT) -
This quake was likely an aftershock of the 7.8 quake Gulf of Alaska, 31 mi east of Simeonof Island, Aleutians East County, Alaska, USA, 22 July 2020 06:12 GMT, which had occurred 16 hours earlier.
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Minor magnitude 3.4 earthquake at 28 km depth
22 Jul 22:07 UTC: First to report: USGS after 16 minutes.
Magnitude: 3.4
Depth: 28.2 km
Epicenter latitude / longitude: 55.0924°N / 158.3928°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Kupreanof (135 km / 84 mi)
Nearby towns and cities:
103 km (64 mi) SSE of Perryville (pop: 113) --> See nearby quakes!
131 km (82 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
134 km (83 mi) S of Chignik (pop: 87) --> See nearby quakes!
136 km (85 mi) E of Sand Point (pop: 1,060) --> See nearby quakes!
204 km (127 mi) ESE of Nelson Lagoon (pop: 52) --> See nearby quakes!
206 km (128 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
250 km (155 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
275 km (171 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
6053 km (3761 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6053 km (3761 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
60 km (37 mi) ENE of Simeonof Island --> See nearby quakes!
82 km (51 mi) ENE of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.9 x 109 joules (2.21 megawatt hours, equivalent to 1.9 tons of TNT) 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 3.4 | 28 km | 102 km SSE of Perryville, Alaska (USA) | USGS |
| M 3.4 | 28 km | Alaska Peninsula (USA) | EMSC |
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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Earlier earthquakes in the same area
Mag. 3.4 earthquake - Gulf of Alaska, 37 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 21:51 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
