M4.2 Earthquake in the Komandorskiye Ostrova, Russia region — September 29, 2025
2025-09-29 13:21:02 UTC (2025-09-29) · approx. 12:21 AM UTC+11 local
On September 29, 2025 at 13:21 UTC, a magnitude 4.2 shallow crustal earthquake struck in the Komandorskiye Ostrova, Russia region, at a depth of 10.0 km and coordinates 54.6509°, 168.1775°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
168.1775°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake in the Komandorskiye Ostrova, Russia region?
The magnitude 4.2 earthquake that struck in the Komandorskiye Ostrova, Russia region on September 29, 2025 at 13:21 UTC had a depth of 10.0 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 4.2 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Actions
Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rih0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 29, 2025). M4.2 Earthquake in the Komandorskiye Ostrova, Russia region — September 29, 2025. Retrieved May 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rih0/