Mag. 3.4 earthquake - Gulf of Alaska, 73 mi southeast of Sand Point, Alaska, USA, on 20 Oct 7:32 am (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 22 hours earlier.
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Minor magnitude 3.4 earthquake at 26 km depth
20 Oct 18:54 UTC: First to report: USGS after 22 minutes.
Local time at epicenter: 20 Oct 7:32 am (GMT -11)
Magnitude: 3.4
Depth: 25.5 km
Epicenter latitude / longitude: 54.4135°N / 159.6024°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Stepovak Bay 2 (169 km / 105 mi)
Nearby towns and cities:
118 km (73 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
169 km (105 mi) S of Perryville (pop: 113) --> See nearby quakes!
189 km (117 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
204 km (127 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
212 km (132 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
218 km (135 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
221 km (138 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
250 km (155 mi) E of False Pass (pop: 40) --> See nearby quakes!
6151 km (3822 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6151 km (3822 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
42 km (26 mi) S of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds
7°C (45 F), humidity: 62%, wind: 4 m/s (8 kts) from ENE
Primary data source: USGS (United States Geological Survey)
Overcast Clouds
7°C (45 F), humidity: 62%, wind: 4 m/s (8 kts) from ENEEstimated released energy: 7.9 x 109 joules (2.21 megawatt hours, equivalent to 1.9 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 3.4 | 26 km | 117 Km SSE of Sand Point, Alaska, USA | USGS |
| M 3.4 | 26 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. 3.4 earthquake - Gulf of Alaska, 73 mi southeast of Sand Point, Alaska, USA, on 20 Oct 7:32 am (GMT -11)
Click here to search our database for earlier earthquakes in the same area since 1900!
