Mag. 3.3 earthquake - Gulf of Alaska, 33 mi northeast of Simeonof Island, Aleutians East County, Alaska, USA, on Thursday, 23 July 2020 at 03:11 (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 21 hours earlier.
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in the US | Alaska | Alaska | Washington DC
Minor magnitude 3.3 earthquake at 10 km depth
23 Jul 03:19 UTC: First to report: USGS after 7 minutes.
Magnitude: 3.3
Depth: 10.0 km
Epicenter latitude / longitude: 55.138°N / 158.5588°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Kupreanof (124 km / 77 mi)
Nearby towns and cities:
94 km (58 mi) SSE of Perryville (pop: 113) --> See nearby quakes!
125 km (78 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
125 km (78 mi) E of Sand Point (pop: 1,060) --> See nearby quakes!
129 km (80 mi) S of Chignik (pop: 87) --> See nearby quakes!
192 km (119 mi) ESE of Nelson Lagoon (pop: 52) --> See nearby quakes!
201 km (125 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
239 km (149 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
264 km (164 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
6061 km (3766 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6061 km (3766 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
52 km (33 mi) ENE of Simeonof Island --> See nearby quakes!
75 km (46 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 | 10 km | 93 km SSE of Perryville, Alaska (USA) | USGS |
| M 3.3 | 10 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.
There are no user reports for this quake yet. If you felt it be the first to report it!
Earlier earthquakes in the same area
Mag. 3.3 earthquake - Gulf of Alaska, 33 mi northeast of Simeonof Island, Aleutians East County, Alaska, USA, on Thursday, 23 July 2020 at 03:11 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
