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Séisme faible mag. 4.4 - Océan Pacifique Nord, 17 km au sud de Tateyama, Chiba, Japon, lundi, 13 sept. 2021 06:31 (GMT +9) -

Séisme faible mag. 4.4 - Océan Pacifique Nord, 17 km au sud de Tateyama, Chiba, Japon, lundi, 13 sept. 2021 06:31 (GMT +9) Séisme faible mag. 4.4 - Océan Pacifique Nord, 17 km au sud de Tateyama, Chiba, Japon, lundi, 13 sept. 2021 06:31 (GMT +9)

Séisme faible magnitude 4.4 à 53 km de profondeur

12 Sep 21:37 UTC: Premier à signaler: NIED après 6 minutes.
Update Sun, 12 Sep 2021, 21:42

Moderate 4.4 quake hits near Tateyama, Tateyama-shi, Chiba, Japan

4.4 quake 13 Sep 6:31 am (GMT +9)
4.4 quake 13 Sep 6:31 am (GMT +9)
An earthquake of magnitude 4.4 occurred only 11 minutes ago 17 km south of Tateyama, Japan, Japan's National Research Institute for Earth Science and Disaster Resilience (NIED) reported.
The quake hit at a moderately shallow depth of 53.2 km beneath the epicenter near Tateyama, Tateyama-shi, Chiba, Japan, early morning on Monday, September 13th, 2021, at 6:31 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 4.3 earthquake.
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 Tateyama (pop. 50,100) located 17 km from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Kamogawa (pop. 29,100) located 38 km from the epicenter, Miura (pop. 51,500) 40 km away, Yokosuka (pop. 429,000) 53 km away, Kimitsu (pop. 92,100) 58 km away, Kamakura (pop. 166,000) 60 km away, Kisarazu (pop. 122,500) 62 km away, Fujisawa (pop. 394,600) 67 km away, Yokohama (pop. 3,574,400) 70 km away, and Tokyo (pop. 8,336,600) 97 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'heure12 Sep 2021 21:31:07 UTC -
Heure locale à l'épicentrelundi, 13 sept. 2021 06:31 (GMT +9)
StatutConfirmé
Magnitude4.4
Profondeur53.2 km
Épicentre latitude / longitude34.828°N / 139.842°E (Océan Pacifique Nord, Japon)
Antipode sismique34.828°S / 40.158°W
Intensité d'agitationSecousses très faibles
Senti3 rapports
Source de données principaleNIED (National Research Institute for Earth Science and Disaster Resilience)
Volcan le plus prèsOshima (42 km / 26 mi)
Lieux à proximité17 km S de Tateyama (pop: 50,100) | Carte | Séismes à proximité
38 km SO de Kamogawa (pop: 29,100) | Carte | Séismes à proximité
40 km SSE de Miura (pop: 51,500) | Carte | Séismes à proximité
53 km SSE de Yokosuka (pop: 429,000) | Carte | Séismes à proximité
58 km S de Kimitsu (pop: 92,100) | Carte | Séismes à proximité
60 km SSE de Kamakura (pop: 166,000) | Carte | Séismes à proximité
62 km S de Kisarazu (pop: 122,500) | Carte | Séismes à proximité
67 km SSE de Fujisawa (pop: 394,600) | Carte | Séismes à proximité
70 km SSE de Yokohama (pop: 3,574,400) | Carte | Séismes à proximité
97 km S de Tokyo (pop: 8,336,600) | Carte | Séismes à proximité
80 km NE de Shikine-jima Island (pop: 600) | Carte | Séismes à proximité
212 km SE de Honshu Island (pop: 104,000,000) | Carte | Séismes à proximité
Météo à l'épicentre au moment du séismeOvercast Clouds 25.1°C (77 F), humidity: 79%, wind: 3 m/s (5 kts) from NW
Énergie sismique estimée libérée2.5 x 1011 joules (69.8 MWh, équivalent à 60 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
4.453 kmJapan: SE OFF BOSO PENINSULANIED
4.350 kmNEAR S. COAST OF HONSHU, JAPANEMSC

Seismograms

Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 242 km / 150 mi | Show on map | Station Info
Seismic station Matsushiro, Japan: 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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Témoignages pour ce séisme (5)

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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Mercure Yokosuka (53 km NNW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 20-30 s
Yokohama, Kanazawa (61.7 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / 2-5 s : Felt short bumps twice, while in bed  
Tokyo / not felt (reported through our app)
Tokyo / not felt (reported through our app)
Oppama / Light shaking (MMI IV) / rattling, vibrating / 15-20 s : Slow shaking (reported through our app)  

Earlier earthquakes in the same area

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