M4.3 Earthquake 15 km NNE of Semboku, Japan — November 1, 2026
2026-11-01 10:44:23 UTC (2 hours ago) · approx. 7:44 PM UTC+9 local
On November 1, 2026 at 10:44 UTC, a magnitude 4.3 intermediate depth earthquake struck 15 km NNE of Semboku, Japan, at a depth of 120.4 km and coordinates 39.8432°, 140.7837°.
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
140.7837°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Semboku, Japan?
The magnitude 4.3 earthquake that struck 15 km NNE of Semboku, Japan on November 1, 2026 at 10:44 UTC had a depth of 120.4 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: us7000tup9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, November 1, 2026). M4.3 Earthquake 15 km NNE of Semboku, Japan — November 1, 2026. Retrieved November 1, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tup9/