M4.3 Earthquake 168 km NE of Kuril’sk, Russia — April 21, 2025
2025-04-21 22:52:27 UTC (2025-04-21) · approx. 8:52 AM UTC+10 local
On April 21, 2025 at 22:52 UTC, a magnitude 4.3 intermediate depth earthquake struck 168 km NE of Kuril’sk, Russia, at a depth of 188.6 km and coordinates 46.2737°, 149.4466°.
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
149.4466°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Kuril’sk, Russia?
The magnitude 4.3 earthquake that struck 168 km NE of Kuril’sk, Russia on April 21, 2025 at 22:52 UTC had a depth of 188.6 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: us7000pu3c). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 21, 2025). M4.3 Earthquake 168 km NE of Kuril’sk, Russia — April 21, 2025. Retrieved June 27, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pu3c/