Mag. 4.2 earthquake - 48 miles SE of Perryville, Alaska, on Sunday, 1 Nov 2020 1:41 pm (GMT -9) -
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 13 days earlier.
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Light magnitude 4.2 earthquake at 5 km depth
1 Nov 23:14 UTC: First to report: USGS after 33 minutes.
2 Nov 00:16: Magnitude recalculated from 4.4 to 4.2. Hypocenter depth recalculated from 35.0 to 4.8 km (from 22 to 3 mi). Epicenter location corrected by 20 km (12.4 mi) towards NE.
2 Nov 00:16: Magnitude recalculated from 4.4 to 4.2. Hypocenter depth recalculated from 35.0 to 4.8 km (from 22 to 3 mi). Epicenter location corrected by 20 km (12.4 mi) towards NE.
Local time at epicenter: Sunday, 1 Nov 2020 1:41 pm (GMT -9)
Magnitude: 4.2
Depth: 4.8 km
Epicenter latitude / longitude: 55.4612°N / 158.1981°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Veniaminof (114 km / 71 mi)
Nearby towns and cities:
78 km (48 mi) SE of Perryville (pop: 113) --> See nearby quakes!
94 km (58 mi) S of Chignik (pop: 87) --> See nearby quakes!
95 km (59 mi) SSE of Chignik Lake (pop: 73) --> See nearby quakes!
146 km (91 mi) E of Sand Point (pop: 1,060) --> See nearby quakes!
167 km (104 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
265 km (165 mi) ENE of King Cove (pop: 1,010) --> See nearby quakes!
439 km (273 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
508 km (315 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
6028 km (3746 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6028 km (3746 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
90 km (56 mi) NE of Little Koniuji Island --> See nearby quakes!
114 km (71 mi) NE of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
1.2°C (34 F), humidity: 83%, wind: 13 m/s (25 kts) from NNE
Primary data source: USGS (United States Geological Survey)
Clear Sky
1.2°C (34 F), humidity: 83%, wind: 13 m/s (25 kts) from NNEEstimated 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 | 4.8 km | 77 Km SE of Perryville, Alaska, USA | USGS |
| M 5.0 | 35 km | ALASKA PENINSULA, USA | EMSC |
User reports for this quake (1)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
