Mag. 4.9 earthquake - Gulf of Alaska, 65 mi southeast of Sand Point, Alaska, USA, on 19 Oct 12:42 pm (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 2 hours and 48 minutes earlier.
Mag. 4.9 earthquake - Gulf of Alaska, 65 mi southeast of Sand Point, Alaska, USA, on 19 Oct 12:42 pm (GMT -11)

Light magnitude 4.9 earthquake at 28 km depth

19 Oct 23:49 UTC: First to report: USGS after 7 minutes.
19 Oct 23:56: Magnitude recalculated from 3.8 to 4.5. Hypocenter depth recalculated from 19.1 to 32.0 km (from 11.9 to 19.9 mi). Epicenter location corrected by 7.3 km (4.6 mi) towards ESE.
19 Oct 23:59: Hypocenter depth recalculated from 32.0 to 31.8 km (from 19.9 to 19.8 mi). Epicenter location corrected by 6.2 km (3.9 mi) towards N.
20 Oct 00:03: Now using data updates from USGS
Date & time: 19 Oct 2020 23:42:15 UTC -
Local time at epicenter: 19 Oct 12:42 pm (GMT -11)
Magnitude: 4.9
Depth: 27.9 km
Epicenter latitude / longitude: 54.4943°N / 159.7769°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Dana (164 km / 102 mi)
Nearby towns and cities:
104 km (65 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
163 km (101 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
175 km (109 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
190 km (118 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
204 km (127 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
206 km (128 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
217 km (135 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
391 km (243 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
6159 km (3827 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6159 km (3827 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
36 km (22 mi) SSW of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Scattered Clouds 8.2°C (47 F), humidity: 74%, wind: 8 m/s (15 kts) from WNW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 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 4.928 km104 Km SSE of Sand Point, Alaska, USAUSGS
M 4.532 kmSouth Of Alaska, USAEMSC
M 5.031 kmSouth of Alaska, USAGFZ
M 5.018 kmSouth of Alaska, USAGeoAu
M 4.532 km111 Km SSE of Sand Point, Alaska, USAUSGS

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 since 1900

Mag. 4.9 earthquake - Gulf of Alaska, 65 mi southeast of Sand Point, Alaska, USA, on 19 Oct 12:42 pm (GMT -11)

Map of earlier quakes

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