M7.1 earthquake central Mid-Atlantic Ridge
A magnitude 7.1 earthquake struck in the central Mid-Atlantic Ridge on Thu, Aug 5, 1971, 12:58 AM GMT-1 (01:58 UTC), 10 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 7.1 (mw), major
- Local time
- UTC
- 1971-08-05 01:58:51 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 0.789° S, 22.071° W
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Magnitude uncertainty
- ±0.30
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem780929. Read Tue, Sep 22, 2026, 3:09 PM UTC.