Mag. 4.2 earthquake - North Pacific Ocean, 82 mi southeast of Sand Point, Alaska, USA, on 19 Oct 10:17 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 12 hours earlier.
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in the US | Alaska | Alaska | Washington DC
Light magnitude 4.2 earthquake at 20 km depth
20 Oct 10:01 UTC: First to report: USGS after 44 minutes.
Local time at epicenter: 19 Oct 10:17 pm (GMT -11)
Magnitude: 4.2
Depth: 20.1 km
Epicenter latitude / longitude: 54.2707°N / 159.594°W
(North Pacific Ocean, Alaska, United States)Nearest volcano: Dana (184 km / 114 mi)
Nearby towns and cities:
132 km (82 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
185 km (115 mi) S of Perryville (pop: 113) --> See nearby quakes!
196 km (122 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
225 km (140 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
227 km (141 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
402 km (250 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
455 km (283 mi) E of Unalaska (pop: 4,490) --> See nearby quakes!
593 km (369 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
6156 km (3825 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6156 km (3825 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
57 km (36 mi) S of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
7.9°C (46 F), humidity: 62%, wind: 4 m/s (7 kts) from N
Primary data source: USGS (United States Geological Survey)
Clear Sky
7.9°C (46 F), humidity: 62%, wind: 4 m/s (7 kts) from NEstimated 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 | 132 Km SSE of Sand Point, Alaska, USA | USGS |
| M 4.2 | 20 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 - North Pacific Ocean, 82 mi southeast of Sand Point, Alaska, USA, on 19 Oct 10:17 pm (GMT -11)
Click here to search our database for earlier earthquakes in the same area since 1900!
