M4.7 Earthquake near Reykjanes Ridge — October 28, 2026
2026-10-28 18:44:30 UTC (4 hours ago) · approx. 4:44 PM UTC-2 local
Aftershock of the M5.2 mainshock.
On October 28, 2026 at 18:44 UTC, a magnitude 4.7 shallow crustal earthquake struck near Reykjanes Ridge, at a depth of 10.0 km and coordinates 57.9607°, -32.2017°. This earthquake was detected by 114 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — 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 3 hours ago near Reykjanes Ridge. Since the mainshock, the USGS has recorded 3 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
-32.2017°E
Technical Information
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Common Questions
How strong was the magnitude 4.7 earthquake near Reykjanes Ridge?
The magnitude 4.7 earthquake that struck near Reykjanes Ridge on October 28, 2026 at 18:44 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 57.9607°, -32.2017°, which is near Reykjanes Ridge.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 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 4.7 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier near Reykjanes Ridge. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Authoritative source: USGS event page (event ID: us7000ttt4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 28, 2026). M4.7 Earthquake near Reykjanes Ridge — October 28, 2026. Retrieved October 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000ttt4/