29 Oct 2025, 06:16 UTC · Oct 29, 2:16 AM ET · PAGER green

M5.5 earthquake southern Mid-Atlantic Ridge

A magnitude 5.5 earthquake struck southern Mid-Atlantic Ridge at Oct 29, 2:16 AM ET, 10 km deep, moderate – felt widely, some damage to weak buildings.

under 33–44–55–66+

Magnitude	5.5 mww
Time	29 Oct 2025, 06:16 UTC
Location	-47.205°, -12.216° – southern Mid-Atlantic Ridge
Depth	10.0 km
Felt reports	0
Max. estimated intensity (MMI)	0.0
PAGER alert	green
USGS event	us6000rk4f

Within 100 km

Other earthquakes nearby this year

Mag.	Where	When (ET)	Depth	Felt
5.3	southern Mid-Atlantic Ridge	Nov 28, 5:46 PM 322 d ago	10 km	–
5.2	southern Mid-Atlantic Ridge	Sep 25, 1:59 PM 386 d ago	10 km	–
5.1	southern Mid-Atlantic Ridge	Sep 25, 1:02 PM 386 d ago	10 km	–
4.6	southern Mid-Atlantic Ridge	Feb 22, 8:42 PM 236 d ago	10 km	–
4.5	southern Mid-Atlantic Ridge	Dec 15, 5:42 AM 305 d ago	10 km	–

FAQ

About this earthquake

How strong was the southern Mid-Atlantic Ridge earthquake?

Magnitude 5.5 (mww), moderate – felt widely, some damage to weak buildings. Depth 10 km.

Was it felt?

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

Were there aftershocks?

No earthquakes within 100 km have followed so far in our records.

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.