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Sismo debile mag. 3.5 - 125 km a sud da Kodiak, Alaska, Stati Uniti, giovedì, 16 dic 2021 08:57 (GMT -10) -

Sismo debile mag. 3.5 - 125 km a sud da Kodiak, Alaska, Stati Uniti, giovedì, 16 dic 2021 08:57 (GMT -10) Sismo debile mag. 3.5 - 125 km a sud da Kodiak, Alaska, Stati Uniti, giovedì, 16 dic 2021 08:57 (GMT -10)

Sismo debile magnitudine 3.5 a 31 km di profondità

16 Dec 19:01 UTC: Primo a segnalare: EMSC dopo 4 minuti.
16 Dec 19:01: Ora utilizzando nuova fonte di dati: USGS
... [show all] ...
17 Dec 00:06: Magnitudine ricalcolata da 3.6 a 3.5. Profondità ricalcolata da 7.7 a 31.2 km (da 4.8 a 19.4 mi). Posizione dell'epicentro corretta di 4.3 km (2.7 mi) al SSE.
Update Thu, 16 Dec 2021, 19:15

Magnitude 3.6 earthquake strikes near Old Harbor, Kodiak Island, Alaska, USA

3.6 quake 16 Dec 8:57 am (GMT -10)
3.6 quake 16 Dec 8:57 am (GMT -10)
An earthquake of magnitude 3.6 occurred in the morning on Thursday, December 16th, 2021, at 8:57 am local time near Old Harbor, Kodiak Island, Alaska, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a very shallow depth of 4.8 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 3.6 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Old Harbor (pop. 220) located 29 miles from the epicenter, and Akhiok (pop. 72) 38 miles away.

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Dettagli del sismo

Data e ora16 Dec 2021 18:57:55 UTC -
Ora locale all'epicentrogiovedì, 16 dic 2021 08:57 (GMT -10)
StatusConfermato
Magnitudine3.5
Prof.31.2 km
Epicentro latitudine / longitudine56.7449°N / 153.1793°W (Gulf of Alaska, Alaska, Stati Uniti)
Antipodo56.745°S / 26.821°E
Intensità di scuotimentoScuotimento molto debole
Sentito0 rapporti
Fonte dati primariaUSGS (United States Geological Survey)
Vulcano più vicinoUnnamed 57.87°N/155.42°W (184 km / 114 mi)
Luoghi vicini52 km S da Old Harbor (pop: 221) | Mappa | Sismi nelle vicinanze
64 km ESE da Akhiok (pop: 72) | Mappa | Sismi nelle vicinanze
101 km SSE da Larsen Bay (pop: 88) | Mappa | Sismi nelle vicinanze
109 km SSO da Womens Bay (pop: 719) | Mappa | Sismi nelle vicinanze
110 km SSO da Chiniak (pop: 47) | Mappa | Sismi nelle vicinanze
119 km SSO da Kodiak Station (pop: 1,300) | Mappa | Sismi nelle vicinanze
120 km SE da Karluk (pop: 37) | Mappa | Sismi nelle vicinanze
125 km SSO da Kodiak (pop: 6,250) | Mappa | Sismi nelle vicinanze
126 km S da Port Lions (pop: 197) | Mappa | Sismi nelle vicinanze
147 km S da Aleneva (pop: 37) | Mappa | Sismi nelle vicinanze
Meteo all'epicentro al momento del sismoLight Rain 2.6°C (37 F), humidity: 98%, wind: 6 m/s (12 kts) from SSE
Energia sismica rilasciata stimata1.1 x 1010 joules (3.12 MWh, equivalent to 2.68 tons of TNT) | about seismic energy
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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
3.531 kmKodiak Island Region, AlaskaUSGS
3.68 kmKODIAK ISLAND REGION, ALASKAEMSC
3.531 kmKodiak Island Region, AlaskaRaspberryShake

Seismograms

Seismic station: Old Harbor, Alaska (OHAK/AT network) | Distance from quake: 54 km / 33 mi | Show on map | Station Info
Seismic station Old Harbor, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Earlier earthquakes in the same area

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