4.9

M4.9 Earthquake near South Atlantic OceanMarch 10, 2026

2026-03-10 23:26:47 UTC (2026-03-10) · approx. 9:26 PM UTC-2 local

MagnitudeM4.9(mb)
Time23:26 UTC9:26 PM UTC-2
Depth10.0 kmshallow crustal
Coordinates-16.723°, -23.448°
Felt byNo felt reports
Status✓ Reviewed by USGS

On March 10, 2026 at 23:26 UTC, a magnitude 4.9 shallow crustal earthquake struck near South Atlantic Ocean, at a depth of 10.0 km and coordinates -16.7225°, -23.4476°. This earthquake was detected by 59 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.

Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at -16.72°, -23.45°

Earthquake Details

Magnitude
4.9 mb
Depth
10.0 km
shallow crustal
Location
-16.7225°N
-23.4476°E

Technical Information

Event ID
us7000s3ij
Event Type
earthquake
Status
✓ Reviewed
Significance
369
Stations Used
59
Azimuthal Gap
66.0°
Min Station Distance
16.308°
RMS Residual
0.65 sec
Last Updated
2026-03-19 22:38:55 UTC

Common Questions

How strong was the magnitude 4.9 earthquake near South Atlantic Ocean?

The magnitude 4.9 earthquake that struck near South Atlantic Ocean on March 10, 2026 at 23:26 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 -16.7225°, -23.4476°, which is near South Atlantic Ocean.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 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.

Authoritative source: USGS event page (event ID: us7000s3ij). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2026, March 10, 2026). M4.9 Earthquake near South Atlantic OceanMarch 10, 2026. Retrieved May 12, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000s3ij/