Shallow M6.6 earthquake hits central Mid-Atlantic Ridge
A strong and shallow earthquake registered by the USGS as M6.6 hit central Mid-Atlantic Ridge at 17:17 UTC on March 28, 2025. The agency is reporting a depth of 6.4 km (4 miles). EMSC is reporting the same magnitude and depth.
Image credit: TW/SAM, Google
This is the fourth M6+ earthquake of the day, following an M6.1 in the central Mid-Atlantic Ridge and M7.7 and M6.4 earthquakes in Myanmar.
The epicenter was located about 50 km (31 miles) SSE of Saint Peter and Saint Paul Archipelago, 586 km (364 miles) NNE of Fernando de Noronha, and 944 km (586 miles) NE of Natal, Brazil.
There is no tsunami threat from this earthquake.
The USGS issued a Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.
Estimated population exposure to earthquake shaking
Regional seismicity
References:
1 M6.6 earthquake central Mid-Atlantic Ridge – USGS – March 28, 2025
2 M6.6 earthquake central Mid-Atlantic Ridge – EMSC – March 28, 2025
Teo Blašković founded The Watchers in 2011 and edited it until 2026, covering seismic and volcanic activity, extreme weather, space weather and near-Earth objects. Articles on this page are his archive.
