Mag. 3.3 earthquake - North Pacific Ocean, 91 mi southeast of Sand Point, Alaska, USA, on 20 Oct 11:03 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 1 day 13 hours earlier.
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Minor magnitude 3.3 earthquake at 20 km depth
21 Oct 10:20 UTC: First to report: USGS after 17 minutes.
Local time at epicenter: 20 Oct 11:03 pm (GMT -11)
Magnitude: 3.3
Depth: 20.0 km
Epicenter latitude / longitude: 54.1272°N / 159.5779°W
(North Pacific Ocean, Alaska, United States)Nearest volcano: Dana (198 km / 123 mi)
Nearby towns and cities:
147 km (91 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
200 km (124 mi) S of Perryville (pop: 113) --> See nearby quakes!
205 km (127 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
233 km (145 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
234 km (145 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
242 km (151 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
252 km (157 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
260 km (162 mi) ESE of False Pass (pop: 40) --> See nearby quakes!
6161 km (3828 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6161 km (3828 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
73 km (46 mi) S of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds
7.5°C (45 F), humidity: 81%, wind: 13 m/s (24 kts) from E
Primary data source: USGS (United States Geological Survey)
Overcast Clouds
7.5°C (45 F), humidity: 81%, wind: 13 m/s (24 kts) from EEstimated released energy: 5.6 x 109 joules (1.56 megawatt hours, equivalent to 1.34 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 3.3 | 20 km | 147 Km SSE of Sand Point, Alaska, USA | USGS |
| M 3.3 | 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. 3.3 earthquake - North Pacific Ocean, 91 mi southeast of Sand Point, Alaska, USA, on 20 Oct 11:03 pm (GMT -11)
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