Mag. 3.1 earthquake - Gulf of Alaska, 91 mi east of Chignik Lake, Alaska, USA, on Tuesday, 11 August 2020 at 03:06 (GMT) -
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 3 weeks earlier.
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Minor magnitude 3.1 earthquake at 2 km depth
11 Aug 03:15 UTC: First to report: USGS after 8 minutes.
Hypocenter depth recalculated from 1.0 to 2.4 km.
Aug 11 03:18: Magnitude recalculated from 3.0 to 3.1.
Hypocenter depth recalculated from 1.0 to 2.4 km.
Aug 11 03:18: Magnitude recalculated from 3.0 to 3.1.
Magnitude: 3.1
Depth: 2.4 km
Epicenter latitude / longitude: 55.9912°N / 156.4494°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Yantarni (123 km / 76 mi)
Nearby towns and cities:
134 km (83 mi) ESE of Chignik Lagoon (pop: 78) --> See nearby quakes!
146 km (91 mi) E of Chignik Lake (pop: 73) --> See nearby quakes!
168 km (104 mi) E of Perryville (pop: 113) --> See nearby quakes!
171 km (106 mi) SE of Port Heiden (pop: 98) --> See nearby quakes!
176 km (109 mi) SW of Akhiok (pop: 72) --> See nearby quakes!
264 km (164 mi) ENE of Sand Point (pop: 1,060) --> See nearby quakes!
306 km (190 mi) SW of Kodiak Station (pop: 1,300) --> See nearby quakes!
317 km (197 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
5906 km (3670 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
5906 km (3670 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
17 km (11 mi) ESE of Semidi s Island --> See nearby quakes!
54 km (33 mi) WNW of Chirikof Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.8 x 109 joules (783 kilowatt hours, equivalent to 0.674 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 3.1 | 35 km | South Of Alaska (USA) | EMSC |
| M 3.1 | 2.4 km | 126 km ESE of Chignik, Alaska (USA) | USGS |
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. 3.1 earthquake - Gulf of Alaska, 91 mi east of Chignik Lake, Alaska, USA, on Tuesday, 11 August 2020 at 03:06 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
