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
I'm a dedicated researcher, journalist, and editor at The Watchers. With over 20 years of experience in the media industry, I specialize in hard science news, focusing on extreme weather, seismic and volcanic activity, space weather, and astronomy, including near-Earth objects and planetary defense strategies. You can reach me at teo /at/ watchers.news.
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