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Séisme faible mag. 4.5 - 19 km au sud-ouest de Susitna North, Arrondissement de Matanuska-Susitna, Alaska, États-Unis, jeudi, 26 nov. 2020 12:12 (GMT -9)

Séisme faible magnitude 4.5 à 40 km de profondeur

26 Nov 21:16 UTC: Premier à signaler: USGS après 4 minutes.
26 Nov 21:20: Profondeur recalculée de 33.5 à 33.7 km (de 21 à 21 mi).
26 Nov 21:25: Profondeur recalculée de 33.7 à 40.3 km (de 21 à 25 mi).
26 Nov 21:31: Profondeur recalculée de 40.3 à 39.7 km (de 25 à 25 mi). Emplacement de l'épicentre corrigé de 3.4 km (2.1 mi) au NNW.

Update Thu, 26 Nov 2020, 21:18

Light magnitude 4.5 quake hits 53 miles north of Anchorage, Alaska around noon

4.5 quake 26 Nov 12:12 pm (GMT -9)

An earthquake of magnitude 4.5 occurred only 6 minutes ago 53 miles north of Anchorage, Alaska, the United States Geological Survey (USGS) reported.
The quake hit at a moderately shallow depth of 21 miles beneath the epicenter near Susitna North around noon on Thursday 26 November 2020 at 12.12 pm local time. 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.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter. Weak shaking might have been felt in Susitna North (pop. 1,300) located 13 miles from the epicenter, Willow (pop. 2,100) 17 miles away, Talkeetna (pop. 900) 24 miles away, Trapper Creek (pop. 500) 24 miles away, Meadow Lakes (pop. 2,200) 25 miles away, Elmendorf Air Force Base (pop. 24,800) 48 miles away, Eagle River (pop. 24,800) 48 miles away, and Anchorage (pop. 298,700) 53 miles away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Détails du séisme

Date et l'heure	26 Nov 2020 21:12:10 UTC
Heure locale à l'épicentre	jeudi, 26 nov. 2020 12:12 (GMT -9)
Statut	Confirmé
Magnitude	4.5
Profondeur	39.7 km
Épicentre latitude / longitude	62.0119°N / 150.0177°W (Arrondissement de Matanuska-Susitna, Alaska, États-Unis)
Antipode sismique	62.012°S / 29.982°E
Intensité d'agitation	Secousses légères
Senti	8 rapports
Source de données principale	USGS (United States Geological Survey)
Volcan le plus près	Hayes (135 km / 84 mi)
Lieux à proximité	19 km SSO de Susitna North (pop: 1,260) \| Carte \| Séismes à proximité 29 km N de Willow Creek (pop: 2,100) \| Carte \| Séismes à proximité 44 km NNO de Houston (pop: 2,210) \| Carte \| Séismes à proximité 48 km NNO de Meadow Lakes (pop: 7,570) \| Carte \| Séismes à proximité 51 km NO de Fishhook (pop: 4,680) \| Carte \| Séismes à proximité 58 km NO de Lakes (pop: 8,360) \| Carte \| Séismes à proximité 60 km NNO de Knik-Fairview (pop: 14,900) \| Carte \| Séismes à proximité 80 km NNO de Eagle River (pop: 24,800) \| Carte \| Séismes à proximité 80 km NNO de Eagle River (Anchorage) (pop: 24,800) \| Carte \| Séismes à proximité 89 km N de Alaska City (pop: 298,700) \| Carte \| Séismes à proximité
Météo à l'épicentre au moment du séisme	Overcast Clouds -2.8°C (27 F), humidity: 90%, wind: 2 m/s (3 kts) from SSE
Énergie sismique estimée libérée	3.5 x 10¹¹ joules (98.6 MWh, équivalent à 84.8 tonnes de TNT) \| about seismic energy

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Données pour le même séisme indiquées par différentes agences

Info : Plus les agences signalent le même séisme et publient des données similaires, plus vous pouvez avoir confiance dans les données. Il faut normalement jusqu'à quelques heures pour que les paramètres sismiques soient calculés avec une précision quasi optimale.

Mag.	Profondeur	Lieu	Source
4.5	40 km	18 Km SSW of Susitna North, Alaska, USA	USGS
4.8	54 km	Central Alaska, USA	GFZ

Séismes les plus récents Top 20 dernières 24 heures Quakes in the US Alaska and Aleutian Islands

Seismograms

Seismic station: Chulitna, AK, USA (CUT/AK network) | Distance from quake: 46 km / 28 mi | Show on map | Station Info

Seismic station Chulitna, AK, USA: 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Chulitna, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Chulitna, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Rabbit Creek, AK, USA (RC01/AK network) | Distance from quake: 104 km / 64 mi | Show on map | Station Info

Seismic station Rabbit Creek, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Rabbit Creek, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Rabbit Creek, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Redoubt, Jurgen's Hut, Redoubt Alaska (RDJH/AV network) | Distance from quake: 217 km / 135 mi | Show on map | Station Info

Seismic station Redoubt, Jurgen's Hut, Redoubt Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Redoubt, Jurgen's Hut, Redoubt Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Redoubt, Jurgen's Hut, Redoubt Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Barnard Glacier, AK, USA (BARN/AK network) | Distance from quake: 455 km / 283 mi | Show on map | Station Info

Seismic station Barnard Glacier, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Barnard Glacier, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Barnard Glacier, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Jago River, AK, USA (C27K/AK network) | Distance from quake: 893 km / 555 mi | Show on map | Station Info

Seismic station Jago River, AK, USA: 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. Bandpass filter applied: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Jago River, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Jago River, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Témoignages pour ce séisme (8)

Les rapports des utilisateurs estiment l'intensité perçue des secousses du sol en fonction de l' Échelle MMI (Modified Mercalli Intensity Scale).

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near Susitna North, Matanuska-Susitna, Alaska (6.6 km NNW of epicenter) [Map] / Light shaking (MMI IV) / 5-10 s : Very light shaking, increasing to like a wiggle with a little jerk. Definitely felt, and heard creaking. | One user found this interesting.

Anchorage / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s : Was sitting on the bed on the 4th floor of my hotel room | One user found this interesting.

near Alaska City, Anchorage (99.9 km S of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)

Lakes, Matanuska-Susitna, Alaska (60.9 km SE of epicenter) [Map] / Light shaking (MMI IV)

BIG LAKE (57 km S of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)

Tanaina, Alaska (50.2 km SE of epicenter) [Map] / Light shaking (MMI IV)

Girdwood, Anchorage, Alaska (125.6 km SSE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)

Talkeetna / Light shaking (MMI IV)

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