M4.4 Earthquake near southern Mid-Atlantic Ridge — June 28, 2026
2026-06-28 00:39:00 UTC (2026-06-28) · approx. 11:39 PM UTC-1 local
On June 28, 2026 at 00:39 UTC, a magnitude 4.4 shallow crustal earthquake struck near southern Mid-Atlantic Ridge, at a depth of 10.0 km and coordinates -39.9204°, -16.5598°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-16.5598°E
Technical Information
Common Questions
How strong was the magnitude 4.4 earthquake near southern Mid-Atlantic Ridge?
The magnitude 4.4 earthquake that struck near southern Mid-Atlantic Ridge on June 28, 2026 at 00:39 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 4.4 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000t9lw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, June 28, 2026). M4.4 Earthquake near southern Mid-Atlantic Ridge — June 28, 2026. Retrieved July 11, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000t9lw/