M5.2 Earthquake near southern Mid-Atlantic Ridge — September 6, 2021
2021-09-06 04:32:06 UTC (2021-09-06) · approx. 3:32 AM UTC-1 local
On September 6, 2021 at 04:32 UTC, a magnitude 5.2 shallow crustal earthquake struck near southern Mid-Atlantic Ridge, at a depth of 10.0 km and coordinates -28.3753°, -12.6837°.
Physical scale: An earthquake of magnitude 5.2 releases seismic energy equivalent to roughly 951 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.3 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-12.6837°E
Technical Information
Common Questions
How strong was the magnitude 5.2 earthquake near southern Mid-Atlantic Ridge?
The magnitude 5.2 earthquake that struck near southern Mid-Atlantic Ridge on September 6, 2021 at 04:32 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -28.3753°, -12.6837°, which is near southern Mid-Atlantic Ridge.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.2 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000f8fb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 6, 2021). M5.2 Earthquake near southern Mid-Atlantic Ridge — September 6, 2021. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000f8fb/