An earthquake of magnitude 5.0 occurred in the morning on Thursday, September 22nd, 2022, at 7:24 am local time near Mobara, Mobara Shi, Chiba, Japan, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a shallow depth of 17.4 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 German Research Centre for Geosciences (GFZ), which listed it as a magnitude 5.3 earthquake. Other agencies reporting the same quake include the citizen-seismograph network of RaspberryShake at magnitude 5.0, the European-Mediterranean Seismological Centre (EMSC) at magnitude 5.0, and France's Réseau National de Surveillance Sismique (RéNaSS) at magnitude 5.2.
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 Hasaki (pop. 39,200) located 69 km from the epicenter, Asahi (pop. 41,700) 78 km away, Yōkaichiba (pop. 32,700) 83 km away, Tōgane (pop. 66,300) 88 km away, Mobara (pop. 97,300) 89 km away, Ōami (pop. 53,200) 91 km away, Yachimata (pop. 83,300) 97 km away, and Kashima-shi (pop. 65,800) 100 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
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