M3.8 Earthquake in the Izu Islands, Japan region — May 11, 2025
2025-05-11 22:57:20 UTC (2025-05-11) · approx. 7:57 AM UTC+9 local
On May 11, 2025 at 22:57 UTC, a magnitude 3.8 deep-focus earthquake struck in the Izu Islands, Japan region, at a depth of 378.0 km and coordinates 31.6492°, 138.1785°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
138.1785°E
Technical Information
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Common Questions
How strong was the magnitude 3.8 earthquake in the Izu Islands, Japan region?
The magnitude 3.8 earthquake that struck in the Izu Islands, Japan region on May 11, 2025 at 22:57 UTC had a depth of 378.0 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000q1m1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, May 11, 2025). M3.8 Earthquake in the Izu Islands, Japan region — May 11, 2025. Retrieved July 24, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000q1m1/