M4.1 Earthquake 94 km SSE of Vilyuchinsk, Russia — December 4, 2025
2025-12-04 18:32:05 UTC (2025-12-04) · approx. 5:32 AM UTC+11 local
On December 4, 2025 at 18:32 UTC, a magnitude 4.1 shallow crustal earthquake struck 94 km SSE of Vilyuchinsk, Russia, at a depth of 61.1 km and coordinates 52.1637°, 159.0157°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.2 mainshock that occurred 29 days ago 48 km SE of Vilyuchinsk, Russia. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
159.0157°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Vilyuchinsk, Russia?
The magnitude 4.1 earthquake that struck 94 km SSE of Vilyuchinsk, Russia on December 4, 2025 at 18:32 UTC had a depth of 61.1 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.
Is this the same earthquake as the M5.2 one earlier?
No. This magnitude 4.1 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier 48 km SE of Vilyuchinsk, Russia. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rw1f). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, December 4, 2025). M4.1 Earthquake 94 km SSE of Vilyuchinsk, Russia — December 4, 2025. Retrieved May 24, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rw1f/