Mag. 3.7 earthquake - Gulf of Alaska, 77 mi southeast of Sand Point, Alaska, USA, on 20 Oct 12:43 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 15 hours earlier.
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Minor magnitude 3.7 earthquake at 29 km depth
20 Oct 13:14 UTC: First to report: USGS after 1 hour and 31 minutes.
Local time at epicenter: 20 Oct 12:43 am (GMT -11)
Magnitude: 3.7
Depth: 29.2 km
Epicenter latitude / longitude: 54.3383°N / 159.6483°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dana (176 km / 109 mi)
Nearby towns and cities:
124 km (77 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
178 km (111 mi) S of Perryville (pop: 113) --> See nearby quakes!
189 km (118 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
210 km (130 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
219 km (136 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
220 km (137 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
231 km (144 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
399 km (248 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
6157 km (3826 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6157 km (3826 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
50 km (31 mi) S of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
6.9°C (44 F), humidity: 68%, wind: 6 m/s (12 kts) from N
Primary data source: USGS (United States Geological Survey)
Clear Sky
6.9°C (44 F), humidity: 68%, wind: 6 m/s (12 kts) from NEstimated 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 | 29 km | 123 Km SSE of Sand Point, Alaska, USA | USGS |
| M 3.7 | 29 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 - Gulf of Alaska, 77 mi southeast of Sand Point, Alaska, USA, on 20 Oct 12:43 am (GMT -11)
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