Mag. 4.2 earthquake - Gulf of Alaska, 67 mi southeast of Sand Point, Alaska, USA, on 24 Sep 9:01 am (GMT -7) -

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 9 weeks earlier.
Mag. 4.2 earthquake  - Gulf of Alaska, 67 mi southeast of Sand Point, Alaska, USA, on 24 Sep 9:01 am (GMT -7)

Light magnitude 4.2 earthquake at 27 km depth

24 Sep 15:56 UTC: First to report: USGS after 47 minutes.
Date & time: 24 Sep 2020 15:09:22 UTC -
Local time at epicenter: 24 Sep 9:01 am (GMT -7)
Magnitude: 4.2
Depth: 27.1 km
Epicenter latitude / longitude: 54.6745°N / 159.2702°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Stepovak Bay 2 (146 km / 91 mi)
Nearby towns and cities:
108 km (67 mi) SE of Sand Point (pop: 1,060) --> See nearby quakes!
138 km (86 mi) S of Perryville (pop: 113) --> See nearby quakes!
179 km (111 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
188 km (117 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
200 km (124 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
425 km (264 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
480 km (298 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
547 km (340 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
6121 km (3804 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6121 km (3804 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
22 km (14 mi) SE of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 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 4.227 km107 Km SE of Sand Point, Alaska, USAUSGS
M 4.740 kmSouth Of Alaska, USAEMSC

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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Chignik Bay (188.1 km NNE of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling / 20-30 s : Rolling side to side slight rapid bumping vibrations in an up and down motion, as well, with the quake coming in two separate fluxes, each beginning with a jolt, but the second jolt was slightly more powerful. The jolts were less than 10 seconds apart from each other. It disturbed our older dog at rest, but our puppy slept right through it. Our two cats didn’t seem to visibly react with running our bolting around, but stayed put in their beds.
Chignik Bay (188.1 km NNE of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling / 20-30 s : Rolling side to side slight rapid bumping vibrations in an up and down motion, as well, with the quake coming in two separate fluxes, each beginning with a jolt, but the second jolt was slightly more powerful. The jolts were less than 10 seconds apart from each other. It disturbed our older dog at rest, but our puppy slept right through it. Our two cats didn’t seem to visibly react with running our bolting around, but stayed put in their beds.
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Earlier earthquakes in the same area

Mag. 4.2 earthquake - Gulf of Alaska, 67 mi southeast of Sand Point, Alaska, USA, on 24 Sep 9:01 am (GMT -7)
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