M4.3 Earthquake in the Bonin Islands, Japan region — September 18, 2026
2026-09-18 20:19:08 UTC (2026-09-18) · approx. 6:19 AM UTC+10 local
On September 18, 2026 at 20:19 UTC, a magnitude 4.3 shallow crustal earthquake struck in the Bonin Islands, Japan region, at a depth of 14.2 km and coordinates 28.0369°, 142.9195°.
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
142.9195°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 September 18, 2026 at 20:19 UTC had a depth of 14.2 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: us6000txf2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 18, 2026). M4.3 Earthquake in the Bonin Islands, Japan region — September 18, 2026. Retrieved October 14, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000txf2/