Light mag. 4.5 earthquake - 28 km southwest of Tokushima, Japan, on Monday, May 23, 2022 at 8:20 am (GMT +9) -

Light mag. 4.5 earthquake - 28 km southwest of Tokushima, Japan, on Monday, May 23, 2022 at 8:20 am (GMT +9) Light mag. 4.5 earthquake - 28 km southwest of Tokushima, Japan, on Monday, May 23, 2022 at 8:20 am (GMT +9)

Light magnitude 4.5 earthquake at 39 km depth

22 May 23:26 UTC: First to report: EMSC after 6 minutes.
23 May 00:00: Now using data updates from USGS
Update Sun, 22 May 2022, 23:30
Moderate magnitude 4.3 earthquake 26 km southwest of Tokushima, Japan
4.3 quake 26 km west of Tokushima, Japan, May 23, 2022 8:20 am (GMT +9)
4.3 quake 26 km west of Tokushima, Japan, May 23, 2022 8:20 am (GMT +9)
An earthquake of magnitude 4.3 occurred in the morning on Monday, May 23rd, 2022, at 8:20 am local time near Tokushima, Tokushima Shi, Japan, as reported by the European-Mediterranean Seismological Centre (EMSC).
According to preliminary data, the quake was located at a moderately shallow depth of 40 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 Japan's National Research Institute for Earth Science and Disaster Resilience (NIED) which listed the quake at magnitude 4.5.
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 Kamojimachō-jōgejima (pop. 24,400) located 9 km from the epicenter, Ishii (pop. 26,400) 15 km away, Wakimachi (pop. 17,700) 16 km away, Tokushima (pop. 267,300) 26 km away, and Komatsushimachō (pop. 42,600) 26 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Anan (pop. 55,400) located 34 km from the epicenter, Narutochō-mitsuishi (pop. 64,100) 36 km away, and Ikedachō (pop. 15,900) 46 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

Earthquake details

Date & timeMay 22, 2022 23:20:22 UTC -
Local time at epicenterMonday, May 23, 2022 at 8:20 am (GMT +9)
Depth39.2 km
Epicenter latitude / longitude33.9541°N / 134.2906°E (Myōzai Gun, Tokushima, Japan)
Antipode33.954°S / 45.709°W
Shaking intensityWeak shaking
Felt5 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoSanbe (201 km / 125 mi)
Nearby towns and cities14 km (9 mi) SSW of Kamojimachō-jōgejima (pop: 24,400) | Show on map | Quakes nearby
19 km (12 mi) SW of Ishii (pop: 26,400) | Show on map | Quakes nearby
27 km (17 mi) W of Komatsushimachō (pop: 42,600) | Show on map | Quakes nearby
28 km (18 mi) WSW of Tokushima (pop: 267,300) | Show on map | Quakes nearby
33 km (21 mi) W of Anan (pop: 55,400) | Show on map | Quakes nearby
40 km (25 mi) SW of Narutochō-mitsuishi (Tokushima-ken) (pop: 64,100) | Show on map | Quakes nearby
138 km (86 mi) SW of Osaka (Ōsaka) (pop: 2,592,400) | Show on map | Quakes nearby
530 km (329 mi) WSW of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
Weather at epicenter at time of quakeFew Clouds 22.3°C (72 F), humidity: 56%, wind: 3 m/s (5 kts) from NNW
Estimated seismic energy released3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 tons of TNT) | about seismic energy
Show interactive Map
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If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
4.539 km13 Km SSW of Kamojimachō-jōgejima, JapanUSGS
4.539 kmShikoku, JapanRaspberryShake

User reports for this quake (5)

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.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Tokushima (25.6 km NE of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump / 1-2 s : This morning I have been standing on my balcony around time at 08:20. I felt one mild strong bump. I hope that is not dangerous shaking.  
Tokushima city (29 km ENE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Tokushima-ken Miyoshi-shi Ikeda-cho (45.2 km W of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short
Home / Strong shaking (MMI VI) / both vertical and horizontal swinging / 2-5 s
Takamatsu / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s
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