M4.1 Earthquake 8 km ENE of Kariwa, Japan — September 25, 2026
2026-09-25 07:18:22 UTC (7 hours ago) · approx. 4:18 PM UTC+9 local
On September 25, 2026 at 07:18 UTC, a magnitude 4.1 intermediate depth earthquake struck 8 km ENE of Kariwa, Japan, at a depth of 165.7 km and coordinates 37.4587°, 138.7057°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
138.7057°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Kariwa, Japan?
The magnitude 4.1 earthquake that struck 8 km ENE of Kariwa, Japan on September 25, 2026 at 07:18 UTC had a depth of 165.7 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000txjc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 25, 2026). M4.1 Earthquake 8 km ENE of Kariwa, Japan — September 25, 2026. Retrieved September 25, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000txjc/