Moderate mag. 4.9 earthquake - Gulf of Alaska, 1 mi east of Sand Point, Alaska, USA, on 24 Sep 9:57 pm (GMT -8) -

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 9 semaines earlier.
Moderate mag. 4.9 earthquake - Gulf of Alaska, 1 mi east of Sand Point, Alaska, USA, on 24 Sep 9:57 pm (GMT -8)

Séisme modéré magnitude 4.9 at 10 km depth

25 Sep 06:04 UTC: Premier à signaler: USGS après 6 minutes.
25 Sep 06:11: Magnitude recalculée de 5.4 à 4.9. Profondeur recalculée de 21.0 à 26.3 km (de 13 à 16.3 mi). Emplacement de l'épicentre corrigé de 15.5 km (9.6 mi) au SSW.
25 Sep 06:15: Profondeur recalculée de 26.3 à 10.0 km (de 16.3 à 6.2 mi). Emplacement de l'épicentre corrigé de 14.6 km (9.1 mi) au SSW.
Date & time: 25 Sep 2020 05:57:57 UTC -
Local time at epicenter: 24 Sep 9:57 pm (GMT -8)
Magnitude: 4.9
Profondeur: 10.0 km
Epicenter latitude / longitude: 55.0499°N / 158.0177°W (Gulf of Alaska, Alaska, États-Unis)
Volcan le plus près: Veniaminof (146 km / 91 mi)
Nearby towns and cities:
119 km SE de Perryville (pop: 113) --> Voir les séismes à proximité!
142 km SSE de Chignik Lake (pop: 73) --> Voir les séismes à proximité!
144 km SSE de Chignik Lagoon (pop: 78) --> Voir les séismes à proximité!
161 km E de Sand Point (pop: 1,060) --> Voir les séismes à proximité!
214 km S de Port Heiden (pop: 98) --> Voir les séismes à proximité!
227 km ESE de Nelson Lagoon (pop: 52) --> Voir les séismes à proximité!
274 km E de King Cove (pop: 1,010) --> Voir les séismes à proximité!
300 km E de Cold Bay (pop: 123) --> Voir les séismes à proximité!
450 km SO de Kodiak Station (pop: 1,300) --> Voir les séismes à proximité!
460 km SO de Kodiak (pop: 6,250) --> Voir les séismes à proximité!
Weather at epicenter at time of quake:
Broken Clouds 9.7°C (49 F), humidity: 73%, wind: 3 m/s (5 kts) from NW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 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.
M 4.910 kmAlaska Peninsula, USAUSGS
M 4.924 kmAlaska Peninsula, USAGFZ
M 4.930 kmAlaska Peninsula, USAEMSC
M 5.015 kmAlaska Peninsula, USAGeoAu
M 5.610 kmAlaska Peninsula, USABMKG

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Perryville (114.1 km NW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / very short (reported through our app)
Portland Oregon / Weak shaking (MMI III) / rattling, vibrating / 20-30 s : This is the only quake in the northern hemisphere at the time. We thought it was closer, but don't see any others. I was already awake, but my wife was awakened by the shaking.
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