M4.6 Earthquake near Reykjanes Ridge — October 12, 2025
2025-10-12 18:27:48 UTC (2025-10-12) · approx. 4:27 PM UTC-2 local
On October 12, 2025 at 18:27 UTC, a magnitude 4.6 shallow crustal earthquake struck near Reykjanes Ridge, at a depth of 10.0 km and coordinates 56.9830°, -33.5585°. This earthquake was detected by 53 seismic stations with good location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-33.5585°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Reykjanes Ridge?
The magnitude 4.6 earthquake that struck near Reykjanes Ridge on October 12, 2025 at 18:27 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 56.9830°, -33.5585°, which is near Reykjanes Ridge.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 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: us6000rgrq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 12, 2025). M4.6 Earthquake near Reykjanes Ridge — October 12, 2025. Retrieved May 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rgrq/