Mag. 4.8 earthquake - Gulf of Alaska, 76 mi southeast of Sand Point, Alaska, USA, on 19 Oct 1:44 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 4 hours earlier.
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Light magnitude 4.8 earthquake at 39 km depth
20 Oct 00:59 UTC: First to report: USGS after 15 minutes.
Local time at epicenter: 19 Oct 1:44 pm (GMT -11)
Magnitude: 4.8
Depth: 39.3 km
Epicenter latitude / longitude: 54.3443°N / 159.6741°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dana (175 km / 109 mi)
Nearby towns and cities:
122 km (76 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
177 km (110 mi) S of Perryville (pop: 113) --> See nearby quakes!
188 km (117 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
208 km (129 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
217 km (135 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
220 km (137 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
230 km (143 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
397 km (247 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
6158 km (3827 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6158 km (3827 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
8.1°C (47 F), humidity: 74%, wind: 7 m/s (13 kts) from WNW
Primary data source: USGS (United States Geological Survey)
Clear Sky
8.1°C (47 F), humidity: 74%, wind: 7 m/s (13 kts) from WNWEstimated released energy: 1 x 1012 joules (278 megawatt hours, equivalent to 239 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 4.8 | 39 km | 122 Km SSE of Sand Point, Alaska, USA | USGS |
| M 4.0 | 30 km | South Of Alaska, USA | EMSC |
| M 4.8 | 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.
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Earlier earthquakes in the same area
Mag. 4.8 earthquake - Gulf of Alaska, 76 mi southeast of Sand Point, Alaska, USA, on 19 Oct 1:44 pm (GMT -11)
Click here to search our database for earlier earthquakes in the same area since 1900!
