Mag. 4.1 earthquake - Gulf of Alaska, 65 mi southeast of King Cove, Alaska, USA, on 4 Oct 12:19 pm (GMT -11) -
This quake was likely an aftershock of the 7.8 quake Gulf of Alaska, 31 mi east of Simeonof Island, Aleutians East County, Alaska, USA, 22 July 2020 06:12 GMT, which had occurred 11 weeks earlier.
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Light magnitude 4.1 earthquake at 10 km depth
4 Oct 23:39 UTC: First to report: EMSC after 21 minutes.
4 Oct 23:40: Now using data updates from USGS
5 Oct 00:42: Magnitude recalculated from 4.5 to 4.1. Hypocenter depth recalculated from 24.4 to 10.0 km (from 15.2 to 6.2 mi). Epicenter location corrected by 8.4 km (5.2 mi) towards NNW.
4 Oct 23:40: Now using data updates from USGS
5 Oct 00:42: Magnitude recalculated from 4.5 to 4.1. Hypocenter depth recalculated from 24.4 to 10.0 km (from 15.2 to 6.2 mi). Epicenter location corrected by 8.4 km (5.2 mi) towards NNW.
Local time at epicenter: 4 Oct 12:19 pm (GMT -11)
Magnitude: 4.1
Depth: 10.0 km
Epicenter latitude / longitude: 54.3349°N / 161.2869°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dutton (120 km / 75 mi)
Nearby towns and cities:
104 km (65 mi) SE of King Cove (pop: 1,010) --> See nearby quakes!
122 km (76 mi) SSW of Sand Point (pop: 1,060) --> See nearby quakes!
132 km (82 mi) SE of Cold Bay (pop: 123) --> See nearby quakes!
149 km (92 mi) ESE of False Pass (pop: 40) --> See nearby quakes!
185 km (115 mi) S of Nelson Lagoon (pop: 52) --> See nearby quakes!
222 km (138 mi) SW of Perryville (pop: 113) --> See nearby quakes!
293 km (182 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
346 km (215 mi) E of Unalaska (pop: 4,490) --> See nearby quakes!
6256 km (3888 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6256 km (3888 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
78 km (48 mi) ESE of Cherni Island --> See nearby quakes!
123 km (76 mi) WSW of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds
9.4°C (49 F), humidity: 80%, wind: 4 m/s (9 kts) from SW
Primary data source: USGS (United States Geological Survey)
Few Clouds
9.4°C (49 F), humidity: 80%, wind: 4 m/s (9 kts) from SWEstimated released energy: 8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 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 4.1 | 10 km | 104 Km SE of King Cove, Alaska, USA | USGS |
| M 4.7 | 10 km | Alaska Peninsula, 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. 4.1 earthquake - Gulf of Alaska, 65 mi southeast of King Cove, Alaska, USA, on 4 Oct 12:19 pm (GMT -11)
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