M4.3 Earthquake in the Izu Islands, Japan region — September 28, 2026
2026-09-28 14:00:41 UTC (2 hours ago) · approx. 11:00 PM UTC+9 local
On September 28, 2026 at 14:00 UTC, a magnitude 4.3 intermediate depth earthquake struck in the Izu Islands, Japan region, at a depth of 290.2 km and coordinates 31.8082°, 138.8008°.
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
138.8008°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake in the Izu Islands, Japan region?
The magnitude 4.3 earthquake that struck in the Izu Islands, Japan region on September 28, 2026 at 14:00 UTC had a depth of 290.2 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: us6000ty5c). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 28, 2026). M4.3 Earthquake in the Izu Islands, Japan region — September 28, 2026. Retrieved September 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000ty5c/