Light mag. 4.4 earthquake - Shiroi-shi, 10.1 km southeast of Abiko, Chiba, Japan, on Saturday, 6 Feb 2021 2:10 pm (GMT +9) -

Light mag. 4.4 earthquake - Shiroi-shi, 10.1 km southeast of Abiko, Chiba, Japan, on Saturday, 6 Feb 2021 2:10 pm (GMT +9)

Light magnitude 4.4 earthquake at 70 km depth

6 Feb 05:17 UTC: First to report: NIED after 7 minutes.
Update Sat, 6 Feb 2021, 05:21
Moderate magnitude 4.4 earthquake 10 km southeast of Abiko, Japan
4.4 quake 6 Feb 2:10 pm (GMT +9)
4.4 quake 6 Feb 2:10 pm (GMT +9)
An earthquake of magnitude 4.4 occurred only 11 minutes ago 10 km southeast of Abiko, Japan, NIED reported.
The quake hit at an intermediate depth of 70 km beneath the epicenter near Abiko, Abiko-shi, Chiba, Japan, early afternoon on Saturday 6 February 2021 at 2:10 pm 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.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Shiroi (pop. 55,300) located 3 km from the epicenter, Abiko (pop. 131,800) 10 km away, Toride (pop. 80,700) 11 km away, Kashiwa (pop. 340,200) 13 km away, Ryūgasaki (pop. 85,800) 13 km away, Sakura (pop. 182,500) 16 km away, Moriya (pop. 56,600) 17 km away, Ushiku (pop. 80,000) 18 km away, Matsudo (pop. 470,300) 18 km away, Yotsukaidō (pop. 86,700) 18 km away, Nagareyama (pop. 156,000) 19 km away, Narita (pop. 100,600) 20 km away, Yashio (pop. 81,300) 24 km away, Yoshikawa (pop. 60,500) 25 km away, Yachimata (pop. 83,300) 26 km away, Inashiki (pop. 47,000) 26 km away, Noda (pop. 121,400) 26 km away, Sōka (pop. 231,400) 27 km away, Koshigaya (pop. 317,400) 30 km away, Ichihara (pop. 283,500) 32 km away, Tōgane (pop. 66,300) 37 km away, Katori-shi (pop. 83,200) 37 km away, Tokyo (pop. 8,336,600) 39 km away, Mobara (pop. 97,300) 46 km away, Kisarazu (pop. 122,500) 49 km away, Asahi (pop. 41,700) 51 km away, Kimitsu (pop. 92,100) 55 km away, Yokohama (pop. 3,574,400) 58 km away, Futtsu (pop. 51,700) 61 km away, Katsuura (pop. 22,300) 76 km away, Kamogawa (pop. 29,100) 79 km away, and Tateyama (pop. 50,100) 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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Earthquake data:

Date & time: 6 Feb 2021 05:10:28 UTC -
Local time at epicenter: Saturday, 6 Feb 2021 2:10 pm (GMT +9)
Magnitude: 4.4
Depth: 70.0 km
Epicenter latitude / longitude: 35.806°N / 140.1°E (Shiroi-shi, Chiba, Japan)
Nearest volcano: Akagi (116 km / 72 mi)
Nearby towns and cities:
3 km (2 mi) ENE of Shiroi (pop: 55,300) --> See nearby quakes!
10 km (6 mi) SE of Abiko (pop: 131,800) --> See nearby quakes!
13 km (8 mi) ESE of Kashiwa (pop: 340,200) --> See nearby quakes!
16 km (10 mi) NE of Funabashi (pop: 560,700) --> See nearby quakes!
16 km (10 mi) NW of Sakura (pop: 182,500) --> See nearby quakes!
18 km (11 mi) E of Matsudo (pop: 470,300) --> See nearby quakes!
19 km (12 mi) ESE of Nagareyama (pop: 156,000) --> See nearby quakes!
23 km (14 mi) N of Chiba (pop: 919,700) --> See nearby quakes!
39 km (24 mi) ENE of Tokyo (pop: 8,336,600) --> See nearby quakes!
58 km (36 mi) NE of Yokohama (Kanagawa) (pop: 3,574,400) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds 15.6°C (60 F), humidity: 36%, wind: 3 m/s (6 kts) from S
Primary data source: NIED (National Research Institute for Earth Science and Disaster Resilience)
Estimated released energy: 2.5 x 1011 joules (69.8 megawatt hours, equivalent to 60 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.
MagnitudeDepthLocationSource
4.470 kmNORTHERN CHIBA PREF, JapanNIED
4.575 kmNEAR EAST COAST OF HONSHU, JAPANEMSC
4.364 km8 Km SSE of Shiroi, JapanUSGS
4.578 kmNear East Coast of Honshu, JapanGFZ

User reports for this quake (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Saitama prefecture, Kawaguchi city (33.9 km W of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s
Yokosuka (70.6 km SSW of epicenter) [Map] / Light shaking (MMI IV)
Nakanoshima, Kawasaki (0.3 km SW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating
Aimata / Very weak shaking (MMI II) / horizontal (sideways) swinging / very short
Tokyo / Weak shaking (MMI III) / 15-20 s
Yokohama / Weak shaking (MMI III) / 5-10 s
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