M4.6 Earthquake near northern Mid-Atlantic Ridge — August 21, 2026
2026-08-21 13:44:07 UTC (1 day ago) · approx. 11:44 AM UTC-2 local
On August 21, 2026 at 13:44 UTC, a magnitude 4.6 shallow crustal earthquake struck near northern Mid-Atlantic Ridge, at a depth of 10.0 km and coordinates 48.0286°, -27.6347°. This earthquake was detected by 48 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
-27.6347°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near northern Mid-Atlantic Ridge?
The magnitude 4.6 earthquake that struck near northern Mid-Atlantic Ridge on August 21, 2026 at 13:44 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 48.0286°, -27.6347°, which is near northern Mid-Atlantic 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.
Actions
Authoritative source: USGS event page (event ID: us6000tmys). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 21, 2026). M4.6 Earthquake near northern Mid-Atlantic Ridge — August 21, 2026. Retrieved August 23, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tmys/