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Terremoto moderato mag. 4.4 - Prefettura di Gunma, 46 km a est da Tōkamachi, Prefettura di Niigata, Giappone, domenica, 18 lug 2021 18:50 (GMT +9) -

Terremoto moderato mag. 4.4 - Prefettura di Gunma, 46 km a est da Tōkamachi, Prefettura di Niigata, Giappone, domenica, 18 lug 2021 18:50 (GMT +9) Terremoto moderato mag. 4.4 - Prefettura di Gunma, 46 km a est da Tōkamachi, Prefettura di Niigata, Giappone, domenica, 18 lug 2021 18:50 (GMT +9)

Terremoto moderato magnitudine 4.4 a 3.7 km di profondità

18 Jul 09:54 UTC: Primo a segnalare: VolcanoDiscovery dopo 4 minuti.
18 Jul 09:57: Ora utilizzando nuova fonte di dati: NIED
Update Sun, 18 Jul 2021, 10:03

Magnitude 4.4 earthquake strikes near Numata, Gunma, Japan

4.4 quake 18 Jul 6:50 pm (GMT +9)
4.4 quake 18 Jul 6:50 pm (GMT +9)
Japan's National Research Institute for Earth Science and Disaster Resilience (NIED) reported a magnitude 4.4 quake in Japan near Numata, Gunma, only 13 minutes ago. The earthquake hit early evening on Sunday 18 July 2021 at 6:50 pm local time at a very shallow depth of 3.7 km. 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 European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.7.
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 Shiozawa (pop. 20,200) located 38 km from the epicenter, Nikkō (pop. 16,000) 45 km away, Tōkamachi (pop. 41,100) 46 km away, Numata (pop. 45,500) 49 km away, and Imaichi (pop. 64,300) 51 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Nagaoka (pop. 195,300) located 59 km from the epicenter, Kanuma (pop. 94,900) 68 km away, and Maebashi (pop. 282,700) 73 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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Dettagli del sismo

Data e ora18 Jul 2021 09:50:07 UTC -
Ora locale all'epicentrodomenica, 18 lug 2021 18:50 (GMT +9)
Prof.3.7 km
Epicentro latitudine / longitudine37.04°N / 139.272°E (Prefettura di Gunma, Giappone)
Antipode37.04°S / 40.728°W
Intensità di scuotimentoScuotimento moderato vicino all'epicentro
Sentito1 rapporto
Fonte dati primariaNIED (National Research Institute for Earth Science and Disaster Resilience)
Vulcano più vicinoHiuchi (10 km / 6 mi)
Luoghi vicini38 km E da Shiozawa (Minamiuonuma, Niigata) (pop: 20,200) | Mappa | Sismi nelle vicinanze
45 km NO da Nikkō (Nikko, Tochigi) (pop: 16,000) | Mappa | Sismi nelle vicinanze
46 km ESE da Tōkamachi (Niigata) (pop: 41,100) | Mappa | Sismi nelle vicinanze
49 km NNE da Numata (pop: 45,500) | Mappa | Sismi nelle vicinanze
51 km NO da Imaichi (Tochigi) (pop: 64,300) | Mappa | Sismi nelle vicinanze
59 km SE da Nagaoka (Niigata) (pop: 195,300) | Mappa | Sismi nelle vicinanze
68 km NO da Kanuma (Tochigi) (pop: 94,900) | Mappa | Sismi nelle vicinanze
73 km NNE da Maebashi (pop: 282,700) | Mappa | Sismi nelle vicinanze
131 km NNO da Saitama (pop: 1,193,400) | Mappa | Sismi nelle vicinanze
155 km NNO da Tokyo (pop: 8,336,600) | Mappa | Sismi nelle vicinanze
Meteo all'epicentro al momento del sismoLight Rain 23.8°C (75 F), humidity: 90%, wind: 1 m/s (2 kts) from S
Energia sismica rilasciata stimata2.5 x 1011 joules (69.8 MWh, equivalent to 60 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.
4.610 kmEastern Honshu, JapanGFZ
4.610 km29 Km ESE of Muikamachi, JapanUSGS


Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 110 km / 68 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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User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
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Fussa Japan (143.2 km S of epicenter) [Map] / Very weak shaking (MMI II) : I was sitting on the couch, I am on the 9th foot and the couch felt like it shook. Like a wobble feeling  

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