Moderato terremoto magnitudine 5.7 - 47 Km ESE of Nikolski, Alaska, USA, giovedì, 08 ottobre 2020 -

Moderato terremoto magnitudine 5.7 - 47 Km ESE of Nikolski, Alaska, USA, giovedì, 08 ottobre 2020

Moderate magnitude 5.7 earthquake at 37 km depth

8 Oct 14:29 UTC: Primo a segnalare: USGS dopo 7 minuti.
8 Oct 14:30: Magnitudine ricalcolata da 5.1 a 5.2. Profondità ricalcolata da 37.0 a 17.6 km (da 23 a 10.9 mi). Posizione dell'epicentro corretta di 15 km (9.3 mi) al S.
8 Oct 14:40: Magnitudine ricalcolata da 5.2 a 5.7. Profondità ricalcolata da 17.6 a 37.0 km (da 10.9 a 23 mi). Posizione dell'epicentro corretta di 8.9 km (5.5 mi) al WNW.
Data & ora: 8 Oct 2020 02:22:39 UTC -
Ora locale a epicentro: 8 Oct 3:22 am (GMT -11)
Magnitudine: 5.7
Profondità: 37.0 km
Epicentro latitudine / longitudine: 52,7184°N / 168,2558°W (Alaska, Stati Uniti)
Vulcano più vicino: Recheschnoi (60 km / 37 mi)
Nearby towns and cities:
48 km ESE da Nikolski (pop: 18)
172 km SW da Isola di Unalaska (pop: 4,490)
227 km SW da Akutan (pop: 1,040)
454 km SW da Cold Bay (pop: 123)
468 km WSW da King Cove (pop: 1,010)
577 km ENE da Adak (pop: 332)
584 km WSW da Sand Point (pop: 1,060)
2193 km W da Juneau (pop: 32,800)
Weather at epicenter at time of quake:
Light Rain 8.6°C (47 F), humidity: 71%, wind: 15 m/s (29 kts) from W
Fonte dati primaria: USGS
Stima dell'energia sismica liberata: 2,2 x 1013 joules (6,22 gigawatt hours, equivalent to 5351 tons of TNT or 0,3 atomic bombs!) 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.
MagnitudineProfonditàUbicazioneFonte
M 5.737 km47 Km ESE of Nikolski, Alaska, USAUSGS
M 5.744 kmFox Islands, Aleutian Islands, USAEMSC
M 5.628 kmFox Islands, Aleutian Islands, USAGFZ
M 5.645 kmFox Islands, Aleutian Islands, USAGeoAu
M 5.810 kmFox Islands, Aleutian Islands, USABMKG

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Dutch Harbor, Unalaska (172.2 km NE of epicenter) [Map] / Weak shaking (MMI III)
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Aftershocks of the 5.7 quake 47 Km ESE of Nikolski, Alaska, USA, 8 Oct 3:22 am (GMT -11)

More info
Recorded aftershocks, latest first (4 quakes):
  • 30 Nov 2020 17:00 UTC
    | M 4.8 |
    56.9 km (35.4 mi) depth
    |
    14 km (9 mi) distance
    | USGS | Details
  • 30 Nov 2020 04:59 UTC
    | M 5.5 |
    30.9 km (19.2 mi) depth
    |
    7 km (5 mi) distance
    | USGS | Details
  • 01 Nov 2020 19:35 UTC
    | M 3.9 |
    35 km (21.7 mi) depth
    |
    4 km (2 mi) distance
    | USGS | Details
  • 23 Oct 2020 03:16 UTC
    | M 4.0 |
    35 km (21.7 mi) depth
    |
    9 km (5 mi) distance
    | USGS | Details

Earlier earthquakes in the same area since 1900

Moderate mag. 5.7 earthquake - 47 Km ESE of Nikolski, Alaska, USA, on 8 Oct 3:22 am (GMT -11)

Map of earlier quakes

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