Moderate mag. 4.7 earthquake - Gulf of Alaska, 66 mi southeast of Sand Point, Alaska, USA, on 21 Oct 1:32 am (GMT -11) -

This quake was likely an aftershock of the 7.6 quake Gulf of Alaska, 60 mi southeast of Санд-Пойнт, Aleutians East County, Alaska, USA, 19 Oct 2020 11:54 am (GMT -9), which had occurred 1 jour 16 heures earlier.
Moderate mag. 4.7 earthquake - Gulf of Alaska, 66 mi southeast of Sand Point, Alaska, USA, on 21 Oct 1:32 am (GMT -11)

Séisme modéré magnitude 4.7 at 26 km depth

21 Oct 12:50 UTC: Premier à signaler: USGS après 17 minutes.
Date & time: 21 Oct 2020 12:32:41 UTC -
Local time at epicenter: 21 Oct 1:32 am (GMT -11)
Magnitude: 4.7
Profondeur: 26.4 km
Epicenter latitude / longitude: 54.5073°N / 159.6943°W (Gulf of Alaska, Alaska, États-Unis)
Volcan le plus près: Stepovak Bay 2 (158 km / 98 mi)
Nearby towns and cities:
106 km SSE de Sand Point (pop: 1,060) --> Voir les séismes à proximité!
160 km SSO de Perryville (pop: 113) --> Voir les séismes à proximité!
179 km ESE de King Cove (pop: 1,010) --> Voir les séismes à proximité!
192 km SSE de Nelson Lagoon (pop: 52) --> Voir les séismes à proximité!
203 km SSO de Chignik Lake (pop: 73) --> Voir les séismes à proximité!
208 km ESE de Cold Bay (pop: 123) --> Voir les séismes à proximité!
213 km SSO de Chignik Lagoon (pop: 78) --> Voir les séismes à proximité!
242 km E de False Pass (pop: 40) --> Voir les séismes à proximité!
279 km SSO de Port Heiden (pop: 98) --> Voir les séismes à proximité!
397 km E de Akutan (pop: 1,040) --> Voir les séismes à proximité!
Weather at epicenter at time of quake:
Overcast Clouds 7.7°C (46 F), humidity: 77%, wind: 14 m/s (26 kts) from E
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.1 x 1011 joules (197 megawatt hours, equivalent to 169 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 4.726 km105 Km SSE of Sand Point, Alaska, USAUSGS
M 4.730 kmSouth Of Alaska, USAEMSC
M 4.730 kmSouth of Alaska, USAGFZ

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Palmer / Light shaking (MMI IV) / 15-20 s
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Earlier earthquakes in the same area

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