Mag. 3.4 earthquake - Gulf of Alaska, 32 mi northeast of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 08:33 (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 2 hours and 21 minutes earlier.
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Minor magnitude 3.4 earthquake at 35 km depth
23 Jul 05:56 UTC: First to report: USGS after 21 hours.
Magnitude: 3.4
Depth: 35.0 km
Epicenter latitude / longitude: 55.1127°N / 158.5568°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Kupreanof (127 km / 79 mi)
Nearby towns and cities:
96 km (60 mi) SSE of Perryville (pop: 113) --> See nearby quakes!
126 km (78 mi) E of Sand Point (pop: 1,060) --> See nearby quakes!
128 km (79 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
133 km (83 mi) S of Chignik Lagoon (pop: 78) --> See nearby quakes!
194 km (120 mi) ESE of Nelson Lagoon (pop: 52) --> See nearby quakes!
204 km (127 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
240 km (149 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
265 km (165 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
6062 km (3767 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6062 km (3767 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
51 km (32 mi) ENE of Simeonof Island --> See nearby quakes!
73 km (45 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 | 35 km | 96 km SSE of Perryville, 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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Earlier earthquakes in the same area
Mag. 3.4 earthquake - Gulf of Alaska, 32 mi northeast of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 08:33 (GMT)
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