Mag. 4.0 earthquake - Gulf of Alaska, 130 mi east of Sand Point, Alaska, USA, on Friday, 14 August 2020 at 23:29 (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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Light magnitude 4.0 earthquake at 3 km depth
14 Aug 23:46 UTC: First to report: USGS after 17 minutes.
Aug 15 00:16: Magnitude recalculated from 4.4 to 4.0.
Hypocenter depth recalculated from 10.0 to 3.0 km.
Aug 15 00:16: Magnitude recalculated from 4.4 to 4.0.
Hypocenter depth recalculated from 10.0 to 3.0 km.
Magnitude: 4
Depth: 3.0 km
Epicenter latitude / longitude: 54.8006°N / 157.3437°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Veniaminof (205 km / 127 mi)
Nearby towns and cities:
168 km (104 mi) SE of Perryville (pop: 113) --> See nearby quakes!
184 km (114 mi) SSE of Chignik Lagoon (pop: 78) --> See nearby quakes!
185 km (115 mi) SSE of Chignik Lake (pop: 73) --> See nearby quakes!
210 km (130 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
252 km (156 mi) SSE of Port Heiden (pop: 98) --> See nearby quakes!
319 km (198 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
441 km (274 mi) SW of Kodiak Station (pop: 1,300) --> See nearby quakes!
451 km (280 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
6000 km (3728 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6000 km (3728 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
124 km (77 mi) E of Simeonof Island --> See nearby quakes!
142 km (88 mi) E of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 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 4.0 | 3 km | 168 km SE of Perryville, Alaska (USA) | USGS |
| M 4.0 | 3 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. 4.0 earthquake - Gulf of Alaska, 130 mi east of Sand Point, Alaska, USA, on Friday, 14 August 2020 at 23:29 (GMT)
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