Mag. 3.8 earthquake - Gulf of Alaska, 40 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 12:56 (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 7 hours earlier.
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Minor magnitude 3.8 earthquake at 26 km depth
22 Jul 13:11 UTC: First to report: USGS after 15 minutes.
Jul 22 13:31: Magnitude recalculated from 3.9 to 3.8.
Hypocenter depth recalculated from 19.2 to 25.8 km.
Jul 22 13:31: Magnitude recalculated from 3.9 to 3.8.
Hypocenter depth recalculated from 19.2 to 25.8 km.
Magnitude: 3.8
Depth: 25.8 km
Epicenter latitude / longitude: 54.8867°N / 158.2714°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Kupreanof (169 km / 105 mi)
Nearby towns and cities:
127 km (79 mi) SSE of Perryville (pop: 113) --> See nearby quakes!
150 km (93 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
155 km (97 mi) SSE of Chignik Lake (pop: 73) --> See nearby quakes!
159 km (99 mi) S of Chignik Lagoon (pop: 78) --> See nearby quakes!
230 km (143 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
259 km (161 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
474 km (294 mi) SW of Kodiak Station (pop: 1,300) --> See nearby quakes!
484 km (301 mi) SW of Kodiak (pop: 6,250) --> 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!
64 km (40 mi) E of Simeonof Island --> See nearby quakes!
83 km (51 mi) E of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.2 x 1010 joules (8.78 megawatt hours, equivalent to 7.56 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 3.8 | 26 km | 126 km SSE of Perryville, Alaska (USA) | USGS |
| M 3.8 | 26 km | South Of Alaska (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. 3.8 earthquake - Gulf of Alaska, 40 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 12:56 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
