Earthquake · central Mid-Atlantic Ridge
M6.6 earthquake near central Mid-Atlantic Ridge
A magnitude 6.6 earthquake struck central Mid-Atlantic Ridge on 17 June 2026 at 18:56 UTC, at a depth of 10 km.
- Magnitude
- 6.6 mww
- When
- 17 June 2026, 18:56 UTC
- Depth
- 10 km
- Location
- 0.58° S, 20.05° W
- USGS PAGER alert
- Green
- Source
- USGS event page
What it means
A magnitude 6.6 is a strong earthquake; there are about 130 a year worldwide, and they can cause damage in populated areas near the epicentre. At 10 km deep it was a shallow earthquake, which usually means stronger shaking near the epicentre.
The magnitude may be revised as more data comes in. Read Earthquake magnitude explained for what the numbers mean.
Aftershocks
6 earthquakes of magnitude 4 or more within 150 km in the 30 days after; the largest was a magnitude 5.4.
| Mag | Where | When (UTC) |
|---|---|---|
| 5.4 | central Mid-Atlantic Ridge | 18 June 2026, 03:43 |
| 5.1 | central Mid-Atlantic Ridge | 18 June 2026, 02:44 |
| 4.5 | central Mid-Atlantic Ridge | 2 July 2026, 06:02 |
| 4.4 | central Mid-Atlantic Ridge | 18 June 2026, 02:37 |
| 4.4 | central Mid-Atlantic Ridge | 18 June 2026, 11:13 |
| 4.4 | central Mid-Atlantic Ridge | 20 June 2026, 20:23 |
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