Mag. 3.9 earthquake - 30 mi south of Sand Point, Aleutians East County, Alaska, on 25 Oct 4:38 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 6 days earlier.
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Minor magnitude 3.9 earthquake at 26 km depth
25 Oct 12:52 UTC: First to report: EMSC after 13 minutes.
25 Oct 12:53: Now using data updates from USGS
25 Oct 12:53: Now using data updates from USGS
Local time at epicenter: 25 Oct 4:38 am (GMT -8)
Magnitude: 3.9
Depth: 26.1 km
Epicenter latitude / longitude: 54.9276°N / 160.2497°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dana (100 km / 62 mi)
Nearby towns and cities:
48 km (30 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
130 km (81 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
133 km (83 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
134 km (83 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
160 km (99 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
175 km (109 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
191 km (119 mi) SW of Chignik (pop: 87) --> See nearby quakes!
367 km (228 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
6171 km (3834 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6171 km (3834 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds
8°C (46 F), humidity: 93%, wind: 2 m/s (3 kts) from ENE
Primary data source: USGS (United States Geological Survey)
Overcast Clouds
8°C (46 F), humidity: 93%, wind: 2 m/s (3 kts) from ENEEstimated 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 | 26 km | 48 Km SSE of Sand Point, Alaska, USA | USGS |
| M 3.6 | 8 km | Alaska Peninsula, 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. 3.9 earthquake - 30 mi south of Sand Point, Aleutians East County, Alaska, on 25 Oct 4:38 am (GMT -8)
Click here to search our database for earlier earthquakes in the same area since 1900!
