M4.4 Earthquake 60 km SSE of Yonakuni, Japan — April 22, 2026
2026-04-22 20:43:28 UTC (2026-04-22) · approx. 4:43 AM UTC+8 local
On April 22, 2026 at 20:43 UTC, a magnitude 4.4 shallow crustal earthquake struck 60 km SSE of Yonakuni, Japan, at a depth of 45.8 km and coordinates 23.9497°, 123.2024°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
123.2024°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Yonakuni, Japan?
The magnitude 4.4 earthquake that struck 60 km SSE of Yonakuni, Japan on April 22, 2026 at 20:43 UTC had a depth of 45.8 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 4.4 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ss6c). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 22, 2026). M4.4 Earthquake 60 km SSE of Yonakuni, Japan — April 22, 2026. Retrieved May 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000ss6c/