Mag. 4.2 earthquake - Gulf of Alaska, 62 mi southeast of Sand Point, Alaska, USA, on 19 Oct 1:23 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 3 hours earlier.
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Light magnitude 4.2 earthquake at 20 km depth
20 Oct 00:44 UTC: First to report: USGS after 21 minutes.
Local time at epicenter: 19 Oct 1:23 pm (GMT -11)
Magnitude: 4.2
Depth: 19.8 km
Epicenter latitude / longitude: 54.5123°N / 159.8573°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dana (152 km / 94 mi)
Nearby towns and cities:
100 km (62 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
162 km (101 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
169 km (105 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
186 km (116 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
198 km (123 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
386 km (240 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
440 km (273 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
588 km (365 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
6163 km (3829 mi) NW of Washington (District of Columbia) (pop: 601,700) --> See nearby quakes!
6163 km (3829 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
36 km (23 mi) SSW of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
8.2°C (47 F), humidity: 73%, wind: 6 m/s (13 kts) from WNW
Primary data source: USGS (United States Geological Survey)
Clear Sky
8.2°C (47 F), humidity: 73%, wind: 6 m/s (13 kts) from WNWEstimated released energy: 1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 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 4.2 | 20 km | 100 Km SSE of Sand Point, Alaska, USA | USGS |
| M 3.7 | 12 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.
There are no user reports for this quake yet. If you felt it be the first to report it!
Earlier earthquakes in the same area
Mag. 4.2 earthquake - Gulf of Alaska, 62 mi southeast of Sand Point, Alaska, USA, on 19 Oct 1:23 pm (GMT -11)Click here to search our database for earlier earthquakes in the same area since 1900!
