M4.2 Earthquake in the Izu Islands, Japan region — March 27, 2026
2026-03-27 23:10:57 UTC (2026-03-27) · approx. 8:10 AM UTC+9 local
On March 27, 2026 at 23:10 UTC, a magnitude 4.2 shallow crustal earthquake struck in the Izu Islands, Japan region, at a depth of 10.0 km and coordinates 31.6397°, 142.2329°.
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
142.2329°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake in the Izu Islands, Japan region?
The magnitude 4.2 earthquake that struck in the Izu Islands, Japan region on March 27, 2026 at 23:10 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.
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: us6000sn9g). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 27, 2026). M4.2 Earthquake in the Izu Islands, Japan region — March 27, 2026. Retrieved May 13, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sn9g/