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Séisme modéré mag. 4.9 - South Pacific Ocean, 170 km à l'est de Nukalofa, Nuku'alofa, Tongatapu, lundi, 21 nov. 2022 23:55 (GMT +13) -

Séisme modéré mag. 4.9 - South Pacific Ocean, 170 km à l\'est de Nukalofa, Nuku\'alofa, Tongatapu, lundi, 21 nov. 2022 23:55 (GMT +13) Séisme modéré mag. 4.9 - South Pacific Ocean, 170 km à l\'est de Nukalofa, Nuku\'alofa, Tongatapu, lundi, 21 nov. 2022 23:55 (GMT +13)

Séisme modéré magnitude 4.9 à 35 km de profondeur

21 Nov 11:14 UTC: Premier à signaler: GFZ après 18 minutes.
21 Nov 11:19: Maintenant en utilisant une nouvelle source de données: USGS
Update Mon, 21 Nov 2022, 11:18

Significant magnitude 5.0 earthquake 93 km east of Nukalofa, Tonga

5.0 quake 21 Nov 11:55 pm (GMT +13)
5.0 quake 21 Nov 11:55 pm (GMT +13)
An earthquake of magnitude 5.0 occurred late at night on Monday, November 21st, 2022, at 11:55 pm local time near Nukalofa, Nuku'alofa, Tongatapu, Tonga, as reported by the German Research Centre for Geosciences (GFZ).
According to preliminary data, the quake was located at a shallow depth of 10 km. 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.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 5.0 as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 5.2.
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 'Ohonua (pop. 1,200) located 72 km from the epicenter, Kolonga (pop. 1,100) 79 km away, Lapaha (pop. 8,000) 84 km away, Nukalofa (pop. 22,400) 93 km away, Nuku'alofa (pop. 22,400) 93 km away, and Haveluloto (pop. 3,400) 94 km 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'heure21 Nov 2022 10:55:38 UTC -
Heure locale à l'épicentrelundi, 21 nov. 2022 23:55 (GMT +13)
StatutConfirmé
Magnitude4.9
Profondeur35.0 km
Épicentre latitude / longitude21.2084°S / 173.5671°W (South Pacific Ocean, Tonga)
Antipode sismique21.208°N / 6.433°E
Intensité d'agitationSecousses légères près de l'épicentre
Senti0 rapports
Source de données principaleUSGS (United States Geological Survey)
Volcan le plus prèsHunga Tonga-Hunga Ha'apai (201 km / 125 mi)
Lieux à proximité144 km E de ‘Ohonua (Ohonua) (pop: 1,240) | Carte | Séismes à proximité
156 km E de Kolonga (pop: 1,100) | Carte | Séismes à proximité
170 km E de Nukalofa (Nuku'alofa) (pop: 22,400) | Carte | Séismes à proximité
170 km E de Nuku‘alofa (pop: 22,400) | Carte | Séismes à proximité
175 km SSE de Bangai (Pangai) (pop: 1,740) | Carte | Séismes à proximité
288 km S de Neiafu (pop: 4,320) | Carte | Séismes à proximité
450 km OSO de Alofi (Niue) (pop: 624) | Carte | Séismes à proximité
452 km OSO de Hakupu (Niue) (pop: 221) | Carte | Séismes à proximité
168 km E de Amsterdam Island (pop: 75,000) | Carte | Séismes à proximité
Météo à l'épicentre au moment du séismeOvercast Clouds 25.1°C (77 F), humidity: 75%, wind: 3 m/s (6 kts) from SE
Énergie sismique estimée libérée1.4 x 1012 joules (392 MWh, équivalent à 338 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.ProfondeurLieuSource
4.935 km144 Km E of ‘Ohonua, TongaUSGS
4.940 kmTONGAEMSC
4.935 kmTonga IslandsRaspberryShake
5.010 kmTonga IslandsGFZ
4.910 kmTonga IslandsIRIS
5.035 kmTonga IslandsGeoAu

Seismograms

Seismic station: Folaha (Nukuhetulu) (TNG1/YC network) | Distance from quake: 170 km / 105 mi | Show on map | Station Info
Seismic station Folaha (Nukuhetulu): 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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Témoignages pour ce séisme (2)

Les rapports des utilisateurs estiment l'intensité perçue des secousses du sol en fonction de l' Échelle MMI (Modified Mercalli Intensity Scale).
Traduire
Apia, Tuamasaga (841.3 km NNE of epicenter) [Map] / not felt (reported through our app)
Lapaha / not felt (reported through our app)

Earlier earthquakes in the same area

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