M4.2 Earthquake 66 km E of Namie, Japan — April 15, 2026
2026-04-15 23:07:02 UTC (2026-04-15) · approx. 8:07 AM UTC+9 local
On April 15, 2026 at 23:07 UTC, a magnitude 4.2 shallow crustal earthquake struck 66 km E of Namie, Japan, at a depth of 65.3 km and coordinates 37.6024°, 141.7413°.
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
141.7413°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Namie, Japan?
The magnitude 4.2 earthquake that struck 66 km E of Namie, Japan on April 15, 2026 at 23:07 UTC had a depth of 65.3 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.
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 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ssdr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 15, 2026). M4.2 Earthquake 66 km E of Namie, Japan — April 15, 2026. Retrieved May 5, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000ssdr/