Mag. 4.0 earthquake - Gulf of Alaska, 103 mi east of Sand Point, Alaska, USA, on Sunday, 23 August 2020 at 02:01 (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 5 weeks earlier.
Mag. 4.0 earthquake  - Gulf of Alaska, 103 mi east of Sand Point, Alaska, USA, on Sunday, 23 August 2020 at 02:01 (GMT)

Light magnitude 4.0 earthquake at 41 km depth

23 Aug 02:19 UTC: First to report: USGS after 18 minutes.
Aug 23 04:28: Magnitude recalculated from 4.4 to 4.0.
Hypocenter depth recalculated from 30.4 to 41.2 km.
Date & time: 23 Aug 2020 02:01:05 UTC -
Magnitude: 4
Depth: 41.2 km
Epicenter latitude / longitude: 54.9896°N / 157.9738°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Veniaminof (159 km / 99 mi)
Nearby towns and cities:
126 km (79 mi) SE of Perryville (pop: 113) --> See nearby quakes!
148 km (92 mi) S of Chignik (pop: 87) --> See nearby quakes!
149 km (93 mi) SSE of Chignik Lake (pop: 73) --> See nearby quakes!
165 km (103 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
221 km (137 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
233 km (145 mi) ESE of Nelson Lagoon (pop: 52) --> See nearby quakes!
277 km (172 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
463 km (288 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
6031 km (3748 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6031 km (3748 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
83 km (52 mi) E of Simeonof Island --> See nearby quakes!
103 km (64 mi) ENE 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
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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.
MagnitudeDepthLocationSource
M 4.041 km126 km SE of Perryville, Alaska (USA)USGS
M 4.041 kmSouth 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.
There are no user reports for this quake yet. If you felt it be the first to report it!
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Earlier earthquakes in the same area

Mag. 4.0 earthquake - Gulf of Alaska, 103 mi east of Sand Point, Alaska, USA, on Sunday, 23 August 2020 at 02:01 (GMT)
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