Mag. 3.9 earthquake - North Pacific Ocean, 90 mi southeast of Sand Point, Alaska, USA, on Tuesday, 20 October 2020 at 05:09 (GMT) -
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 8 hours earlier.
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Minor magnitude 3.9 earthquake at 25 km depth
20 Oct 08:24 UTC: First to report: USGS after 3 hours.
Magnitude: 3.9
Depth: 25.2 km
Epicenter latitude / longitude: 54.1673°N / 159.484°W

Nearest volcano: Stepovak Bay 2 (197 km / 122 mi)
Nearby towns and cities:
145 km (90 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
195 km (121 mi) S of Perryville (pop: 113) --> See nearby quakes!
208 km (129 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
232 km (144 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
237 km (147 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
237 km (147 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
246 km (153 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
265 km (165 mi) ESE of False Pass (pop: 40) --> See nearby quakes!
6153 km (3824 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6153 km (3824 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
69 km (43 mi) S of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 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 3.9 | 25 km | 145 Km SSE of Sand Point, Alaska, USA | USGS |
User reports for this quake
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There are no user reports for this quake yet. If you felt it Earlier earthquakes in the same area since 1900
Mag. 3.9 earthquake - North Pacific Ocean, 90 mi southeast of Sand Point, Alaska, USA, on Tuesday, 20 October 2020 at 05:09 (GMT)- Date / time UTC| Mag |Depth|Age|Distance| Details
- 01 Apr 1946 12:29| 8.6 |15km / 9.3mi|75 years ago|232km / 144mi| 1946 Aleutian Islands (Unimak Island) Earthquake, Alaska (USA)
- 10 Nov 1938 20:18| 8.2 |35km / 22mi|82 years ago|140km / 87mi| Alaska Peninsula (USA)
- 23 Jan 2018 09:31| 7.9 |25km / 16mi|3 years ago|692km / 430mi| - 292km SE of Kodiak, Alaska
- 09 Oct 1900 12:25| 7.9 |unknown|120 years ago|497km / 309mi| Kodiak Island Region, Alaska (USA)
- 22 Jul 2020 06:12| 7.8 |28km / 17mi|26 weeks ago|114km / 71mi| 105 Km SSE of Perryville, Alaska (USA)
- 02 Jul 1965 20:58| 7.8 |45km / 28mi|56 years ago|560km / 348mi| Fox Islands, Aleutian Islands, Alaska (USA)
- 07 Mar 1929 01:34| 7.8 |15km / 9.3mi|92 years ago|786km / 488mi| South of the Aleutian Islands (USA)
- 03 Nov 1943 14:32| 7.6 |15km / 9.3mi|77 years ago|980km / 609mi| Southern Alaska (USA)
- 19 Oct 2020 20:54| 7.6 |35km / 22mi|14 weeks ago|51km / 32mi| 97 Km SE of Sand Point, Alaska, USA
- 31 May 1917 08:47| 7.4 |35km / 22mi|104 years ago|85km / 53mi| South of Alaska (USA)
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