Mag. 3.3 earthquake - Gulf of Alaska, 16 mi northeast of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 09:10 (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 57 minutes earlier.
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Minor magnitude 3.3 earthquake at 17 km depth
22 Jul 09:33 UTC: First to report: USGS after 23 minutes.
Magnitude: 3.3
Depth: 16.7 km
Epicenter latitude / longitude: 55.02°N / 158.9188°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Stepovak Bay 2 (122 km / 76 mi)
Nearby towns and cities:
100 km (62 mi) S of Perryville (pop: 113) --> See nearby quakes!
106 km (66 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
138 km (86 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
145 km (90 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
181 km (112 mi) SE of Nelson Lagoon (pop: 52) --> See nearby quakes!
215 km (133 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
217 km (135 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
243 km (151 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
6087 km (3782 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6087 km (3782 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
26 km (16 mi) ENE of Simeonof Island --> See nearby quakes!
48 km (30 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 | 17 km | 100 km S of Perryville, Alaska (USA) | USGS |
| M 3.3 | 17 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, 16 mi northeast of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 09:10 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
