M6.6 earthquake in Northern Mid-Atlantic Ridge on March 21, 2026

On March 21, 2026 at 12:16 UTC the ground shook with a magnitude 6.6 earthquake. The epicenter was Northern Mid-Atlantic Ridge, with the focus 10 km deep. It was a shallow quake, and shallow quakes are usually felt most strongly at the surface.

6.6magnitude

10 kmdepth

12:16time UTC

greenUSGS alert

Live earthquake map →

Key facts

The USGS PAGER system issued a green alert, expecting little impact. USGS flagged the event as an oceanic-region earthquake. Regional tsunami warning centers publish any tsunami information.

Nearest cities

Carolina (Puerto Rico)2,175 km
San Juan (Puerto Rico)2,187 km
Paramaribo (Suriname)2,238 km
Ponce (Puerto Rico)2,256 km
Georgetown (Guyana)2,310 km

Did you feel an earthquake?

Report it to seismologists. These reports help work out quickly where the shaking was strongest. It takes a minute.

Report to USGS (Did You Feel It?)Report to EMSC (LastQuake)

Aftershocks

Since then USGS has recorded 5 quakes of magnitude 4.5 or more within 150 km, the strongest M5.2.

M5.2 · Mar 30, 14:43 UTC21 km
M5.1 · Mar 23, 01:41 UTC17 km
M4.8 · Apr 8, 14:55 UTC25 km
M4.6 · Mar 22, 05:26 UTC10 km
M4.5 · Oct 2, 00:24 UTC7 km

Regional history

Since 1976 there have been 6 earthquakes of magnitude 6 or more within 300 km. The strongest was M6.4 (June 10, 1991).

M6.4 · June 10, 199145 km
M6.3 · March 26, 198024 km
M6.1 · June 21, 2016150 km
M6.0 · July 27, 201427 km
M6.0 · June 28, 1977155 km