M4.2 Earthquake 84 km SW of Yonakuni, Japan — June 23, 2022
2022-06-23 21:58:52 UTC (2022-06-23) · approx. 5:58 AM UTC+8 local
On June 23, 2022 at 21:58 UTC, a magnitude 4.2 shallow crustal earthquake struck 84 km SW of Yonakuni, Japan, at a depth of 10.0 km and coordinates 23.8765°, 122.4709°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
122.4709°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Yonakuni, Japan?
The magnitude 4.2 earthquake that struck 84 km SW of Yonakuni, Japan on June 23, 2022 at 21:58 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000hjrs). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, June 23, 2022). M4.2 Earthquake 84 km SW of Yonakuni, Japan — June 23, 2022. Retrieved August 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000hjrs/