21 Mar 2026, 12:16 UTC · Mar 21, 8:16 AM ET · PAGER green · tsunami flag

M6.6 earthquake northern Mid-Atlantic Ridge

A magnitude 6.6 earthquake struck northern Mid-Atlantic Ridge at Mar 21, 8:16 AM ET, 10 km deep, strong – damage in populated areas near the epicenter.

under 33–44–55–66+

Magnitude	6.6 mww
Time	21 Mar 2026, 12:16 UTC
Location	23.860°, -45.799° – northern Mid-Atlantic Ridge
Depth	10.0 km
Felt reports	0
Max. estimated intensity (MMI)	0.0
PAGER alert	green
USGS event	us6000si5l

Within 100 km

Other earthquakes nearby this year

Mag.	Where	When (ET)	Depth	Felt
5.2	northern Mid-Atlantic Ridge	Mar 30, 10:43 AM 200 d ago	10 km	–
5.1	northern Mid-Atlantic Ridge	Mar 22, 9:41 PM 208 d ago	10 km	–
4.8	northern Mid-Atlantic Ridge	Apr 8, 10:55 AM 191 d ago	10 km	–
4.7	northern Mid-Atlantic Ridge	Nov 23, 8:56 AM 327 d ago	10 km	–
4.6	northern Mid-Atlantic Ridge	Mar 22, 1:26 AM 209 d ago	10 km	–
4.3	northern Mid-Atlantic Ridge	Mar 22, 1:52 PM 208 d ago	10 km	–

FAQ

About this earthquake

How strong was the northern Mid-Atlantic Ridge earthquake?

Magnitude 6.6 (mww), strong – damage in populated areas near the epicenter. Depth 10 km.

Was it felt?

No felt reports have been submitted to the USGS so far.

Were there aftershocks?

4 earthquakes within 100 km in the following two weeks are in our records, the strongest M5.2.

Earthquakes

Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.