M4.1 Earthquake 223 km SSW of Severo-Kuril’sk, Russia — September 4, 2025
2025-09-04 23:09:16 UTC (2025-09-04) · approx. 9:09 AM UTC+10 local
On September 4, 2025 at 23:09 UTC, a magnitude 4.1 intermediate depth earthquake struck 223 km SSW of Severo-Kuril’sk, Russia, at a depth of 84.4 km and coordinates 48.9429°, 154.5563°.
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
154.5563°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Severo-Kuril’sk, Russia?
The magnitude 4.1 earthquake that struck 223 km SSW of Severo-Kuril’sk, Russia on September 4, 2025 at 23:09 UTC had a depth of 84.4 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 4.1 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: us6000rd84). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 4, 2025). M4.1 Earthquake 223 km SSW of Severo-Kuril’sk, Russia — September 4, 2025. Retrieved November 30, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000rd84/