Sismo leggero mag. 3.9 - Gulf of Alaska, 154 km a est da Sand Point, Borough delle Aleutine orientali, Alaska, Stati Uniti, mercoledì, 31 marzo 2021 -

Sismo leggero mag. 3.9 - Gulf of Alaska, 154 km a est da Sand Point, Borough delle Aleutine orientali, Alaska, Stati Uniti, mercoledì, 31 marzo 2021

Sismo leggero magnitudine 3.9 at 12 km depth

31 Mar 01:21 UTC: Primo a segnalare: USGS dopo 5 minuti.
31 Mar 01:22: Magnitudine ricalcolata da 3.9 a 3.8. Profondità ricalcolata da 14.6 a 32.9 km (da 9.1 a 20 mi). Posizione dell'epicentro corretta di 8.3 km (5.1 mi) al NO.
... [show all] ...
31 Mar 01:27: Profondità ricalcolata da 12.1 a 11.9 km (da 7.5 a 7.4 mi).
Update Wed, 31 Mar 2021, 01:27
Small tremor of magnitude 3.9 just reported 52 miles southeast of Perryville, Alaska, United States
3.9 quake 30 Mar 5:16 pm (GMT -8)
3.9 quake 30 Mar 5:16 pm (GMT -8)
Just 10 minutes ago, a 3.9-magnitude earthquake struck near Perryville, Lake and Peninsula, Alaska, USA. The tremor was recorded in the afternoon on Tuesday 30 March 2021 at 5:16 pm local time, at a shallow depth of 7.5 miles below the surface.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.9 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Perryville (pop. 110) located 52 miles from the epicenter.
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Earthquake data:

Data & ora: 31 Mar 2021 01:16:54 UTC -
Ora locale a epicentro: martedì, 30 mar 2021 17:16 (GMT -8)
Magnitudine: 3.9
Profondità: 11.9 km
Epicentro latitudine / longitudine: 55.4534°N / 158.0688°W (Gulf of Alaska, Alaska, Stati Uniti)
Vulcano più vicino: Veniaminof (114 km / 71 mi)
Nearby towns and cities:
85 km SE da Perryville (pop: 113) --> Vedi sismi vicini
99 km SSE da Chignik Lake (pop: 73) --> Vedi sismi vicini
99 km SSE da Chignik Lagoon (pop: 78) --> Vedi sismi vicini
154 km E da Sandpoint (pop: 1,060) --> Vedi sismi vicini
169 km SSE da Port Heiden (pop: 98) --> Vedi sismi vicini
206 km ESE da Nelson Lagoon (pop: 52) --> Vedi sismi vicini
273 km E da King Cove (pop: 1,010) --> Vedi sismi vicini
422 km SO da Kodiak Station (pop: 1,300) --> Vedi sismi vicini
433 km SO da Saint Paul (Kodiak Island) (pop: 6,250) --> Vedi sismi vicini
433 km SO da Saint Paul (pop: 6,250) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Few Clouds 2.7°C (37 F), humidity: 61%, wind: 11 m/s (21 kts) from WNW
Fonte dati primaria: USGS (United States Geological Survey)
Stima dell'energia sismica liberata: 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.
3.912 km84 Km SE of Perryville, Alaska, USAUSGS

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Chignik Bay, AK (95.8 km NNW of epicenter) [Map] / Weak shaking (MMI III) : Heard and felt, vibrations and slight side to side movement. Did not awake sleeping dogs. Person that has never felt an earthquake before asked if that was an earthquake, but did not need convincing that it was. Was also felt and recognized at the school. | 2 users found this interesting. (reported through our app)  
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