M4.3 Earthquake in the Bonin Islands, Japan region — July 25, 2025
2025-07-25 19:05:06 UTC (2025-07-25) · approx. 4:05 AM UTC+9 local
On July 25, 2025 at 19:05 UTC, a magnitude 4.3 deep-focus earthquake struck in the Bonin Islands, Japan region, at a depth of 478.2 km and coordinates 27.1252°, 140.1384°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
140.1384°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake in the Bonin Islands, Japan region?
The magnitude 4.3 earthquake that struck in the Bonin Islands, Japan region on July 25, 2025 at 19:05 UTC had a depth of 478.2 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000qv6n). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 25, 2025). M4.3 Earthquake in the Bonin Islands, Japan region — July 25, 2025. Retrieved October 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qv6n/