Moderate mag. 3.9 earthquake - Gulf of Alaska, 49 mi southeast of Perryville, Alaska, USA, on Friday, 21 August 2020 at 19:10 (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 4 semaines earlier.
Moderate mag. 3.9 earthquake - Gulf of Alaska, 49 mi southeast of Perryville, Alaska, USA, on Friday, 21 August 2020 at 19:10 (GMT)

Séisme modéré magnitude 3.9 at 10 km depth

21 Aug 19:56 UTC: Premier à signaler: USGS après 46 minutes.
Aug 21 20:18: Magnitude recalculée de 4.4 à 3.9.
Profondeur recalculée de 16.6 à 9.6 km.
Date & time: 21 Aug 2020 19:10:18 UTC -
Magnitude: 3.9
Profondeur: 9.6 km
Epicenter latitude / longitude: 55.4254°N / 158.2383°W (Gulf of Alaska, Alaska, États-Unis)
Volcan le plus près: Veniaminof (100 km / 62 mi)
Nearby towns and cities:
78 km SE de Perryville (pop: 113) --> Voir les séismes à proximité!
98 km SSE de Chignik Lake (pop: 73) --> Voir les séismes à proximité!
100 km S de Chignik Lagoon (pop: 78) --> Voir les séismes à proximité!
143 km E de Sand Point (pop: 1,060) --> Voir les séismes à proximité!
171 km S de Port Heiden (pop: 98) --> Voir les séismes à proximité!
197 km ESE de Nelson Lagoon (pop: 52) --> Voir les séismes à proximité!
262 km E de King Cove (pop: 1,010) --> Voir les séismes à proximité!
285 km E de Cold Bay (pop: 123) --> Voir les séismes à proximité!
432 km SO de Kodiak Station (pop: 1,300) --> Voir les séismes à proximité!
443 km SO de Kodiak (pop: 6,250) --> Voir les séismes à proximité!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) More info
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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.
MagnitudeProfondeurLocationSource
M 3.99.6 km78 km SE of Perryville, Alaska (USA)USGS
M 4.410 kmAlaska 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.
79.4 km NW of epicenter [Map] / Weak shaking (MMI III) (reported through our app)
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Earlier earthquakes in the same area

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