Traduire
BROKEN ARROW, OK / Weak shaking (MMI III) / 5-10 s
Tulsa / Very weak shaking (MMI II) / single vertical bump / 1-2 s : A big jolt
Quinton / Moderate shaking (MMI V) / rattling, vibrating / 1-2 s
Séisme faible mag. 3.7 - 41 km au nord-est de McAlester, Comté de Pittsburg County, Oklahoma, États-Unis, mardi, 24 août 2021 10:23 (GMT -5) -
Overview | Données sismiques | Carte interactive | Témoignages | Séismes antérieurs ici | Séismes États-Unis | Oklahoma | Arkansas
Séisme faible magnitude 3.7 à 6.6 km de profondeur
24 Aug 15:25 UTC: Premier à signaler: USGS après 2 minutes.
24 Aug 15:28: Magnitude recalculée de 3.8 à 4.1. Emplacement de l'épicentre corrigé de 1.6 km (1 mi) au NO.
24 Aug 15:34: Magnitude recalculée de 4.1 à 3.7. Profondeur recalculée de 5.0 à 6.6 km (de 3.1 à 4.1 mi). Emplacement de l'épicentre corrigé de 0.8 km (0.5 mi) au NNW.
24 Aug 15:28: Magnitude recalculée de 3.8 à 4.1. Emplacement de l'épicentre corrigé de 1.6 km (1 mi) au NO.
24 Aug 15:34: Magnitude recalculée de 4.1 à 3.7. Profondeur recalculée de 5.0 à 6.6 km (de 3.1 à 4.1 mi). Emplacement de l'épicentre corrigé de 0.8 km (0.5 mi) au NNW.
Update Tue, 24 Aug 2021, 15:33
Moderate magnitude 4.1 quake hits 26 miles northeast of McAlester, Oklahoma, United States in the morning 4.1 quake 24 Aug 10:23 am (GMT -5)
An earthquake of magnitude 4.1 occurred only 9 minutes ago 26 miles northeast of McAlester, Oklahoma, United States, the United States Geological Survey reported.
The quake hit at a very shallow depth of 3.1 miles beneath the epicenter near McAlester, Pittsburg County, Oklahoma, USA, in the morning on Tuesday 24 August 2021 at 10:23 am 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.8 earthquake.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Quinton (pop. 1000) located 1 miles from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Wilburton (pop. 2,700) located 13 miles from the epicenter, and Stigler (pop. 2,800) 17 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include McAlester (pop. 18,300) located 26 miles from the epicenter, Muskogee (pop. 38,500) 44 miles away, Fort Smith (pop. 88,200) 58 miles away, Tahlequah (pop. 16,600) 60 miles away, and Van Buren (pop. 23,100) 62 miles away.
The quake hit at a very shallow depth of 3.1 miles beneath the epicenter near McAlester, Pittsburg County, Oklahoma, USA, in the morning on Tuesday 24 August 2021 at 10:23 am 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.8 earthquake.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Quinton (pop. 1000) located 1 miles from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Wilburton (pop. 2,700) located 13 miles from the epicenter, and Stigler (pop. 2,800) 17 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include McAlester (pop. 18,300) located 26 miles from the epicenter, Muskogee (pop. 38,500) 44 miles away, Fort Smith (pop. 88,200) 58 miles away, Tahlequah (pop. 16,600) 60 miles away, and Van Buren (pop. 23,100) 62 miles away.
Earthquake data
Détails du séisme
| Date et l'heure | 24 Aug 2021 15:23:45 UTC - |
| Heure locale à l'épicentre | mardi, 24 août 2021 10:23 (GMT -5) |
| Statut | Confirmé |
| Magnitude | 3.7 |
| Profondeur | 6.6 km |
| Épicentre latitude / longitude | 35.11117°N / 95.3725°W  (Comté de Pittsburg, Oklahoma, États-Unis) |
| Antipode | 35.111°S / 84.628°E |
| Intensité d'agitation | Secousses faibles |
| Senti | 3 rapports |
| Source de données principale | USGS (United States Geological Survey) |
| Lieux à proximité | 1 km S de Quinton (pop: 1,010) | Carte | Séismes à proximité 22 km NNO de Wilburton (pop: 2,680) | Carte | Séismes à proximité 28 km SO de Stigler (pop: 2,770) | Carte | Séismes à proximité 41 km ENE de McAlester (Pittsburg County) (pop: 18,300) | Carte | Séismes à proximité 50 km NO de Talihina (pop: 1,100) | Carte | Séismes à proximité 71 km S de Muskogee (pop: 38,500) | Carte | Séismes à proximité 94 km OSO de Fort Smith (Arkansas) (pop: 88,200) | Carte | Séismes à proximité 97 km SSO de Tahlequah (Cherokee County) (pop: 16,600) | Carte | Séismes à proximité 100 km OSO de Van Buren (Arkansas) (pop: 23,100) | Carte | Séismes à proximité 199 km E de Oklahoma City (pop: 631,300) | Carte | Séismes à proximité |
| Météo à l'épicentre au moment du séisme | Clear Sky  30.3°C (87 F), humidity: 51%, wind: 3 m/s (6 kts) from S |
| Énergie sismique estimée libérée | 2.2 x 1010 joules (6.22 MWh, équivalent à 5.35 tonnes de TNT) | about seismic energy |
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 |
| 3.7 | 6.6 km | 1 Km S of Quinton, Oklahoma | USGS |
| 4.0 | 5 km | OKLAHOMA | EMSC |
Témoignages pour ce séisme (3)
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