Sismo debile mag. 3.1 - Borough di Matanuska-Susitna Parish, 19 km a nord da Alaska City, Anchorage, Alaska, Stati Uniti, venerdì, 24 set 2021 12:34 (GMT -8) -

Sismo debile mag. 3.1 - Borough di Matanuska-Susitna Parish, 19 km a nord da Alaska City, Anchorage, Alaska, Stati Uniti, venerdì, 24 set 2021 12:34 (GMT -8)

Sismo debile magnitudine 3.1 at 34 km depth

24 Sep 20:38 UTC: Primo a segnalare: USGS dopo 4 minuti.
24 Sep 20:38: Magnitudine ricalcolata da 3.4 a 3.3. Profondità ricalcolata da 39.1 a 36.1 km (da 24 a 22 mi). Posizione dell'epicentro corretta di 59 km (37 mi) al SE.
... [show all] ...
24 Sep 22:44: Magnitudine ricalcolata da 3.3 a 3.1. Profondità ricalcolata da 17.8 a 33.5 km (da 11.1 a 21 mi). Posizione dell'epicentro corretta di 5 km (3.1 mi) al ESE.
Update Fri, 24 Sep 2021, 20:45
Small 3.3 quake hits near Alaska City, Anchorage, Alaska, USA
3.3 quake 24 Sep 12:34 pm (GMT -8)
3.3 quake 24 Sep 12:34 pm (GMT -8)
The United States Geological Survey reported a magnitude 3.3 quake in the United States near Alaska City, Anchorage, Alaska, only 10 minutes ago. The earthquake hit around noon on Friday, September 24th, 2021, at 12:34 pm local time at a shallow depth of 11 miles. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.3 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Point MacKenzie (pop. 530) located 4 miles from the epicenter, Big Lake (pop. 3,400) 9 miles away, Alaska City (pop. 298,700) 14 miles away, Knik-Fairview (pop. 14,900) 18 miles away, Eagle River (pop. 24,800) 18 miles away, Eagle River (pop. 24,800) 18 miles away, Elmendorf Air Force Base (pop. 6,600) 18 miles away, and Meadow Lakes (pop. 7,600) 22 miles away. In Wasilla (pop. 9,300, 25 miles away), the quake was probably not felt.
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Earthquake data

Data & ora: 24 Sep 2021 20:34:51 UTC -
Ora locale a epicentro: venerdì, 24 set 2021 12:34 (GMT -8)
Magnitudine: 3.1
Prof.: 33.5 km
Epicentro latitudine / longitudine: 61.3803°N / 149.9902°W (Borough di Matanuska-Susitna, Alaska, Stati Uniti)
Antipode: 61.38°S / 30.01°E
Vulcano più vicino: Spurr (117 km / 73 mi)
Nearby towns and cities:
2 km NNO da Point MacKenzie (pop: 529) --> Vedi sismi vicini
16 km S da Big Lake (pop: 3,350) --> Vedi sismi vicini
19 km NNO da Alaska City (pop: 298,700) --> Vedi sismi vicini
23 km ONO da Eagle River (pop: 24,800) --> Vedi sismi vicini
23 km ONO da Eagle River (Anchorage) (pop: 24,800) --> Vedi sismi vicini
25 km SO da Knik-Fairview (pop: 14,900) --> Vedi sismi vicini
29 km SSO da Houston (pop: 2,210) --> Vedi sismi vicini
37 km SO da Wasilla (pop: 9,280) --> Vedi sismi vicini
45 km OSO da Gateway (pop: 5,550) --> Vedi sismi vicini
932 km ONO da Juneau (pop: 32,800) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Light Rain 1.6°C (35 F), humidity: 92%, wind: 2 m/s (4 kts) from S
Fonte dati primaria: USGS (United States Geological Survey)
Stima dell'energia sismica liberata: 2.8 x 109 joules (783 kWh, equivalent to 0.674 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.
Mag.Prof.UbicazioneFonte
3.134 kmSouthern AlaskaUSGS
3.134 kmSOUTHERN ALASKAEMSC

User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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JBER / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Rumble and a vertical shake, then dishes rattled a little.  
Chugiak / Very weak shaking (MMI II) / 1-2 s (reported through our app)
JBER / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Rumble and a vertical shake, then dishes rattled a little.  
Palmer Ak / Moderate shaking (MMI V) / very short (reported through our app)
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