Terremoto moderato mag. 4.0 - 1.6 km a ovest da Honmachi, Yatsushiro Shi, Prefettura di Kumamoto, Giappone, venerdí, 19 marzo 2021 -

Terremoto moderato mag. 4.0 - 1.6 km a ovest da Honmachi, Yatsushiro Shi, Prefettura di Kumamoto, Giappone, venerdí, 19 marzo 2021

Terremoto moderato magnitudine 4.0 at 15 km depth

19 Mar 16:57 UTC: Primo a segnalare: NIED dopo 6 minuti.
Update Fri, 19 Mar 2021, 17:03
Moderate earthquake of magnitude 4.0 just reported 2 km southwest of Honmachi, Japan
4.0 quake 20 Mar 1:50 am (GMT +9)
4.0 quake 20 Mar 1:50 am (GMT +9)
Just 12 minutes ago, a 4.0-magnitude earthquake struck near Honmachi, Yatsushiro Shi, Kumamoto, Japan. The tremor was recorded early morning on Saturday 20 March 2021 at 1:50 am local time, at a shallow depth of 14.5 km below the surface.
The event was filed by Japan's National Research Institute for Earth Science and Disaster Resilience (NIED), the first seismological agency to report it.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.0 earthquake as well.
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 Honmachi (pop. 104,300) located 2 km from the epicenter, Matsubase (pop. 26,200) 18 km away, and Uto (pop. 39,200) 22 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Hitoyoshi (pop. 38,000) located 35 km from the epicenter, Kumamoto (pop. 680,400) 36 km away, Minamata (pop. 29,400) 36 km away, Hondomachi-hondo (pop. 40,800) 39 km away, and Uekimachi-mōno (pop. 31,700) 46 km away.
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Earthquake data:

Data & ora: 19 Mar 2021 16:50:51 UTC -
Ora locale a epicentro: Saturday, 20 Mar 2021 01:50 (GMT +9)
Magnitudine: 4
Profondità: 14.5 km
Epicentro latitudine / longitudine: 32.5°N / 130.583°E (Yatsushiro Shi, Prefettura di Kumamoto, Giappone)
Vulcano più vicino: Unzen (39 km / 24 mi)
Nearby towns and cities:
2 km OSO da Honmachi (pop: 104,300) --> Vedi sismi vicini
18 km SSO da Matsubase (Uki) (pop: 26,200) --> Vedi sismi vicini
22 km SSO da Uto (pop: 39,200) --> Vedi sismi vicini
35 km NNO da Hitoyoshi (pop: 38,000) --> Vedi sismi vicini
36 km SSO da Kumamoto (pop: 680,400) --> Vedi sismi vicini
36 km NNE da Minamata (pop: 29,400) --> Vedi sismi vicini
39 km E da Hondomachi-hondo (pop: 40,800) --> Vedi sismi vicini
46 km SSO da Uekimachi-mōno (Kumamoto) (pop: 31,700) --> Vedi sismi vicini
123 km S da Fukuoka (pop: 1,392,300) --> Vedi sismi vicini
910 km OSO da Tokyo (pop: 8,336,600) --> Vedi sismi vicini
39 km O da Kyushu Island (pop: 13,232,000) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Overcast Clouds 15°C (59 F), humidity: 82%, wind: 1 m/s (2 kts) from ESE
Fonte dati primaria: NIED (National Research Institute for Earth Science and Disaster Resilience)
Stima dell'energia sismica liberata: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) More info
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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.

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