M3.9 Earthquake 29 km NW of Comrie, United Kingdom — October 20, 2025
2025-10-20 17:06:43 UTC (2025-10-20) · approx. 5:06 PM UTC+0 local
Felt by 19 people across nearby locations.
On October 20, 2025 at 17:06 UTC, a magnitude 3.9 shallow crustal earthquake struck 29 km NW of Comrie, United Kingdom, at a depth of 10.0 km and coordinates 56.5393°, -4.3366°. This earthquake was detected by 13 seismic stations with moderate location accuracy and was assigned a USGS significance rating of 242, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 19 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-4.3366°E
Technical Information
Common Questions
How strong was the magnitude 3.9 earthquake near Comrie, United Kingdom?
The magnitude 3.9 earthquake that struck 29 km NW of Comrie, United Kingdom on October 20, 2025 at 17:06 UTC had a depth of 10.0 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 56.5393°, -4.3366°, which is 29 km NW of Comrie, United Kingdom.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 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.
Authoritative source: USGS event page (event ID: us6000ric0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 20, 2025). M3.9 Earthquake 29 km NW of Comrie, United Kingdom — October 20, 2025. Retrieved May 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000ric0/