M4.0 Earthquake in the Izu Islands, Japan region — April 14, 2025
2025-04-14 23:07:09 UTC (2025-04-14) · approx. 8:07 AM UTC+9 local
On April 14, 2025 at 23:07 UTC, a magnitude 4.0 deep-focus earthquake struck in the Izu Islands, Japan region, at a depth of 421.1 km and coordinates 29.8727°, 138.9953°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
138.9953°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake in the Izu Islands, Japan region?
The magnitude 4.0 earthquake that struck in the Izu Islands, Japan region on April 14, 2025 at 23:07 UTC had a depth of 421.1 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000q62e). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 14, 2025). M4.0 Earthquake in the Izu Islands, Japan region — April 14, 2025. Retrieved June 14, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000q62e/