M5.1 Earthquake 139 km SE of Petropavlovsk-Kamchatsky, Russia — September 21, 2025
2025-09-21 03:20:53 UTC (2025-09-21) · approx. 2:20 PM UTC+11 local
On September 21, 2025 at 03:20 UTC, a magnitude 5.1 shallow crustal earthquake struck 139 km SE of Petropavlovsk-Kamchatsky, Russia, at a depth of 27.5 km and coordinates 52.2948°, 160.2652°. This earthquake was detected by 103 seismic stations with good location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Russia, a region characterized by the Kuril-Kamchatka subduction zone on the northwestern Pacific Ring of Fire. The nearest mapped fault system is the Kuril-Kamchatka Trench. View all earthquakes in Russia.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
160.2652°E
Technical Information
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Common Questions
How strong was the magnitude 5.1 earthquake near Petropavlovsk-Kamchatsky, Russia?
The magnitude 5.1 earthquake that struck 139 km SE of Petropavlovsk-Kamchatsky, Russia on September 21, 2025 at 03:20 UTC had a depth of 27.5 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 52.2948°, 160.2652°, which is 139 km SE of Petropavlovsk-Kamchatsky, Russia. View all earthquakes in Russia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Has Russia had earthquakes this big before?
The largest recorded earthquake in Russia was the M9.0 Kamchatka earthquake of November 4, 1952. Today's magnitude 5.1 event is significantly smaller than that historical record.
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.
Authoritative source: USGS event page (event ID: us7000qxmn). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 21, 2025). M5.1 Earthquake 139 km SE of Petropavlovsk-Kamchatsky, Russia — September 21, 2025. Retrieved May 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000qxmn/