Strong mag. 5.3 earthquake - North Pacific Ocean, 130 km east of Mito, Ibaraki, Japan, on Wednesday, Aug 4, 2021 1:40 pm (GMT +9) -

This quake was likely an aftershock of the 5.8 quake North Pacific Ocean, 98 km northeast of Hasaki, Chōshi-shi, Chiba, Japan, Aug 4, 2021 5:33 am (GMT +9), which had occurred 8 hours earlier.
Strong mag. 5.3 earthquake - North Pacific Ocean, 130 km east of Mito, Ibaraki, Japan, on Wednesday, Aug 4, 2021 1:40 pm (GMT +9)

Strong magnitude 5.3 earthquake at 10 km depth

4 Aug 04:48 UTC: First to report: GFZ after 8 minutes.
4 Aug 04:50: Magnitude recalculated from 5.3 to 5.5. Epicenter location corrected by 4.2 km (2.6 mi) towards WNW.
4 Aug 06:50: Magnitude recalculated from 5.5 to 5.3.
Date & time: Aug 4, 2021 04:40:24 UTC -
Local time at epicenter: Wednesday, Aug 4, 2021 1:40 pm (GMT +9)
Magnitude: 5.3
Depth: 10.0 km
Epicenter latitude / longitude: 36.1°N / 141.86°E (North Pacific Ocean, Japan)
Antipode: 36.1°S / 38.14°W
Nearest volcano: Nasu (204 km / 127 mi)
Nearby towns and cities:
101 km (63 mi) ENE of Hasaki (pop: 39,200) --> See nearby quakes!
110 km (69 mi) E of Kashima-shi (pop: 65,800) --> See nearby quakes!
122 km (76 mi) ESE of Hitachi (pop: 186,300) --> See nearby quakes!
123 km (76 mi) ESE of Katsuta (pop: 156,000) --> See nearby quakes!
123 km (77 mi) ESE of Hitachi-Naka (pop: 156,800) --> See nearby quakes!
124 km (77 mi) E of Katori-shi (pop: 83,200) --> See nearby quakes!
130 km (80 mi) E of Mito (pop: 246,500) --> See nearby quakes!
137 km (85 mi) SE of Iwaki (pop: 357,300) --> See nearby quakes!
201 km (125 mi) ENE of Tokyo (pop: 8,336,600) --> See nearby quakes!
213 km (132 mi) ENE of Yokohama (pop: 3,574,400) --> See nearby quakes!
347 km (216 mi) E of Honshū Island (pop: 104,000,000) --> See nearby quakes!
311 km (193 mi) NE of Shikine-jima Island (pop: 600) --> See nearby quakes!
Weather at epicenter at time of quake:
Scattered Clouds 26.9°C (80 F), humidity: 78%, wind: 4 m/s (8 kts) from SSE
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 5.6 x 1012 joules (1.56 gigawatt hours, equivalent to 1344 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.
5.310 kmNear East Coast of Honshu, JapanGFZ
5.410 kmJapan: Near TokyoRENASS
5.410.1 km95 Km ENE of Hasaki, JapanUSGS
5.910 kmNear East Coast of Honshu, JapanBMKG
5.429 kmNear East Coast of Honshu, JapanGeoAu

User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Narita / Very weak shaking (MMI II) / horizontal (sideways) swinging / 5-10 s
Chuo-ku Tokyo (192.6 km WSW of epicenter) [Map] / Weak shaking (MMI III) / 10-15 s (reported through our app)
牛久市 (152.7 km W of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s (reported through our app)
Fukushima ken (222.2 km NW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake : Weak shaking  
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