M4.3 Earthquake 59 km E of Severo-Kuril’sk, Russia — September 8, 2025
2025-09-08 22:58:55 UTC (2025-09-08) · approx. 8:58 AM UTC+10 local
On September 8, 2025 at 22:58 UTC, a magnitude 4.3 shallow crustal earthquake struck 59 km E of Severo-Kuril’sk, Russia, at a depth of 66.0 km and coordinates 50.7515°, 156.9587°.
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
156.9587°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Severo-Kuril’sk, Russia?
The magnitude 4.3 earthquake that struck 59 km E of Severo-Kuril’sk, Russia on September 8, 2025 at 22:58 UTC had a depth of 66.0 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: us6000rea8). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 8, 2025). M4.3 Earthquake 59 km E of Severo-Kuril’sk, Russia — September 8, 2025. Retrieved November 30, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000rea8/