M4.3 Earthquake 64 km NE of Kuji, Japan — August 4, 2026
2026-08-04 21:08:55 UTC (2026-08-04) · approx. 6:08 AM UTC+9 local
On August 4, 2026 at 21:08 UTC, a magnitude 4.3 shallow crustal earthquake struck 64 km NE of Kuji, Japan, at a depth of 50.4 km and coordinates 40.5954°, 142.3088°.
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
142.3088°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Kuji, Japan?
The magnitude 4.3 earthquake that struck 64 km NE of Kuji, Japan on August 4, 2026 at 21:08 UTC had a depth of 50.4 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: us6000ti4p). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 4, 2026). M4.3 Earthquake 64 km NE of Kuji, Japan — August 4, 2026. Retrieved August 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000ti4p/