Mag. 4.0 earthquake - Gulf of Alaska, 14 mi northeast of Big Koniuji Island, Aleutians East County, Alaska, USA, on Friday, 24 July 2020 at 15:54 (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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Light magnitude 4.0 earthquake at 29 km depth
24 Jul 16:04 UTC: First to report: USGS after 9 minutes.
Magnitude: 4
Depth: 28.9 km
Epicenter latitude / longitude: 55.2471°N / 159.2623°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Stepovak Bay 2 (89 km / 55 mi)
Nearby towns and cities:
74 km (46 mi) S of Perryville (pop: 113) --> See nearby quakes!
79 km (49 mi) E of Sand Point (pop: 1,060) --> See nearby quakes!
116 km (72 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
128 km (80 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
195 km (121 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
437 km (271 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
493 km (306 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
507 km (315 mi) WSW of Kodiak (pop: 6,250) --> See nearby quakes!
6099 km (3790 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6099 km (3790 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
22 km (14 mi) NE of Big Koniuji Island --> See nearby quakes!
55 km (34 mi) NNE of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 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 4.0 | 29 km | 74 km S of Ivanof Bay, Alaska (USA) | USGS |
| M 3.5 | 26 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. 4.0 earthquake - Gulf of Alaska, 14 mi northeast of Big Koniuji Island, Aleutians East County, Alaska, USA, on Friday, 24 July 2020 at 15:54 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
