M4.1 Earthquake 18 km W of Grindavík, Iceland — March 23, 2026
2026-03-23 18:45:31 UTC (2026-03-23) · approx. 4:45 PM UTC-2 local
On March 23, 2026 at 18:45 UTC, a magnitude 4.1 shallow crustal earthquake struck 18 km W of Grindavík, Iceland, at a depth of 10.0 km and coordinates 63.8668°, -22.8147°.
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.
Earthquake Details
-22.8147°E
Technical Information
Common Questions
How strong was the magnitude 4.1 earthquake near Grindavík, Iceland?
The magnitude 4.1 earthquake that struck 18 km W of Grindavík, Iceland on March 23, 2026 at 18:45 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 4.1 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 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000s751). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 23, 2026). M4.1 Earthquake 18 km W of Grindavík, Iceland — March 23, 2026. Retrieved May 18, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000s751/