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.
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in the US| Alaska | Alaska
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.
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)Broken Clouds
9.7°C (49 F), humidity: 73%, wind: 3 m/s (5 kts) from NWEstimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 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 | Profondeur | Location | Source |
| M 4.9 | 10 km | Alaska Peninsula, USA | USGS |
| M 4.9 | 24 km | Alaska Peninsula, USA | GFZ |
| M 4.9 | 30 km | Alaska Peninsula, USA | EMSC |
| M 5.0 | 15 km | Alaska Peninsula, USA | GeoAu |
| M 5.6 | 10 km | Alaska Peninsula, USA | BMKG |
User reports for this quake (2)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
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.
Earlier earthquakes in the same area
Click here to search our database for earlier earthquakes in the same area since 1900!
