Mag. 3.3 earthquake - Gulf of Alaska, 29 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Friday, 24 July 2020 at 08:05 (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 days earlier.
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Minor magnitude 3.3 earthquake at 28 km depth
24 Jul 11:22 UTC: First to report: USGS after 3 hours.
Jul 24 15:30: Magnitude recalculated from 3.5 to 3.3.
Hypocenter depth recalculated from 18.7 to 28.3 km.
Jul 24 15:30: Magnitude recalculated from 3.5 to 3.3.
Hypocenter depth recalculated from 18.7 to 28.3 km.
Magnitude: 3.3
Depth: 28.3 km
Epicenter latitude / longitude: 54.9824°N / 158.5621°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Kupreanof (138 km / 86 mi)
Nearby towns and cities:
110 km (68 mi) SSE of Perryville (pop: 113) --> See nearby quakes!
129 km (80 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
142 km (88 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
146 km (91 mi) S of Chignik (pop: 87) --> See nearby quakes!
201 km (125 mi) ESE of Nelson Lagoon (pop: 52) --> See nearby quakes!
218 km (136 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
240 km (149 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
266 km (165 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
6067 km (3770 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6067 km (3770 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
46 km (29 mi) ENE of Simeonof Island --> See nearby quakes!
67 km (42 mi) ENE of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5.6 x 109 joules (1.56 megawatt hours, equivalent to 1.34 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 3.3 | 28 km | 109 km SSE of Perryville, Alaska (USA) | USGS |
| M 3.5 | 19 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. 3.3 earthquake - Gulf of Alaska, 29 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Friday, 24 July 2020 at 08:05 (GMT)
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