Mag. 4.7 earthquake - Gulf of Alaska, 66 mi southeast of Sand Point, Alaska, USA, on 21 Oct 1:32 am (GMT -11) -

This quake was likely an aftershock of the 7.6 quake Gulf of Alaska, 60 mi southeast of Sand Point, Aleutians East County, Alaska, USA, 19 Oct 2020 11:54 am (GMT -9), which had occurred 1 day 16 hours earlier.
Mag. 4.7 earthquake  - Gulf of Alaska, 66 mi southeast of Sand Point, Alaska, USA, on 21 Oct 1:32 am (GMT -11)

Light magnitude 4.7 earthquake at 26 km depth

21 Oct 12:50 UTC: First to report: USGS after 17 minutes.
Date & time: 21 Oct 2020 12:32:41 UTC -
Local time at epicenter: 21 Oct 1:32 am (GMT -11)
Magnitude: 4.7
Depth: 26.4 km
Epicenter latitude / longitude: 54.5073°N / 159.6943°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Stepovak Bay 2 (158 km / 98 mi)
Nearby towns and cities:
106 km (66 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
160 km (99 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
179 km (111 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
192 km (119 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
203 km (126 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
208 km (129 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
213 km (133 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
397 km (246 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
6153 km (3823 mi) NW of Washington (District of Columbia) (pop: 601,700) --> See nearby quakes!
6153 km (3823 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
32 km (20 mi) SSW of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 7.7°C (46 F), humidity: 77%, wind: 14 m/s (26 kts) from E
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.1 x 1011 joules (197 megawatt hours, equivalent to 169 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.
M 4.726 km105 Km SSE of Sand Point, Alaska, USAUSGS
M 4.730 kmSouth Of Alaska, USAEMSC
M 4.730 kmSouth of Alaska, USAGFZ

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Palmer / Light shaking (MMI IV) / 15-20 s
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Earlier earthquakes in the same area

Mag. 4.7 earthquake - Gulf of Alaska, 66 mi southeast of Sand Point, Alaska, USA, on 21 Oct 1:32 am (GMT -11)
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