Moderate mag. 5.8 earthquake - Gulf of Alaska, 9.2 mi northeast of Big Koniuji Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 08:13 (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 1 minutes earlier.
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Moderate magnitude 5.8 earthquake at 37 km depth
22 Jul 08:29 UTC: First to report: USGS after 16 minutes.
Magnitude: 5.8
Depth: 36.7 km
Epicenter latitude / longitude: 55.2233°N / 159.3719°W
(Gulf of Alaska, United States)Nearest volcano: Stepovak Bay 2 (66 km / 41 mi)
Nearby towns and cities:
72 km (45 mi) E of Sand Point (pop: 1,060) --> See nearby quakes!
78 km (48 mi) S of Perryville (pop: 113) --> See nearby quakes!
121 km (75 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
132 km (82 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
144 km (90 mi) SE of Nelson Lagoon (pop: 52) --> See nearby quakes!
188 km (117 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
429 km (267 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
514 km (319 mi) WSW of Kodiak (pop: 6,250) --> See nearby quakes!
6107 km (3795 mi) NW of Washington DC (pop: 601,700) --> See nearby quakes!
6107 km (3795 mi) NW of Washington DC (pop: 601,700) --> See nearby quakes!
15 km (9 mi) NE of Big Koniuji Island --> See nearby quakes!
436 km (271 mi) WSW of Kodiak Island (pop: 13,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.2 x 1013 joules (8.78 gigawatt hours, equivalent to 7558 tons of TNT or 0.5 atomic bombs!) 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 6.5 | 31 km | Alaska Peninsula (USA) | GFZ |
| M 6.2 | 45 km | Alaska Peninsula (USA) | EMSC |
| M 5.8 | 37 km | 72 km E of Sand Point, Alaska (USA) | USGS |
| M 6.0 | 44 km | Alaska Peninsula (USA) | GeoAu |
| M 6.6 | 31 km | Alaska Peninsula (USA) | BMKG |
User reports for this quake (2)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Nikiski,AK (771.1 km NE of epicenter) [Map] / Very weak shaking (MMI II) : My wind chimes were swaying back and forth (reported through our app)
port townsend wa / not felt
Earlier earthquakes in the same area
Moderate mag. 5.8 earthquake - Gulf of Alaska, 9.2 mi northeast of Big Koniuji Island, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 08:13 (GMT)
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