Mag. 3.7 earthquake - 51 mi southeast of Sand Point, Alaska, USA, on 20 Oct 8:24 am (GMT -8) -
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 20 hours earlier.
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Minor magnitude 3.7 earthquake at 7 km depth
20 Oct 17:13 UTC: First to report: USGS after 49 minutes.
Local time at epicenter: 20 Oct 8:24 am (GMT -8)
Magnitude: 3.7
Depth: 6.9 km
Epicenter latitude / longitude: 54.9713°N / 159.3856°W
(Alaska, United States)Nearest volcano: Stepovak Bay 2 (113 km / 70 mi)
Nearby towns and cities:
82 km (51 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
106 km (66 mi) S of Perryville (pop: 113) --> See nearby quakes!
148 km (92 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
160 km (99 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
162 km (101 mi) SE of Nelson Lagoon (pop: 52) --> See nearby quakes!
187 km (116 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
214 km (133 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
224 km (139 mi) SSW of Port Heiden (pop: 98) --> See nearby quakes!
6117 km (3801 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6117 km (3801 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds
5.9°C (43 F), humidity: 65%, wind: 4 m/s (7 kts) from NNE
Primary data source: USGS (United States Geological Survey)
Few Clouds
5.9°C (43 F), humidity: 65%, wind: 4 m/s (7 kts) from NNEEstimated released energy: 2.2 x 1010 joules (6.22 megawatt hours, equivalent to 5.35 tons of TNT) 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 3.7 | 6.9 km | 81 Km ESE of Sand Point, Alaska, USA | USGS |
| M 3.7 | 7 km | South 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.
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Earlier earthquakes in the same area
Mag. 3.7 earthquake - 51 mi southeast of Sand Point, Alaska, USA, on 20 Oct 8:24 am (GMT -8)
Click here to search our database for earlier earthquakes in the same area since 1900!
