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M6.6 earthquake, central Mid-Atlantic Ridge, 2026-06-17

MagnitudeM6.6mww

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Depth10 km

Time (UTC)2026-06-17 18:56

Rank in 202621 / 102among M6+

Rank since 19003816 / 14,458

Energy vs an M6×8approx.

central Mid-Atlantic Ridge · -0.58, -20.05

M5.5+ within 100 km in the next 30 days

None

M6.5+ within 300 km (largest first)

2016 M7.1M7.1

1971 M7.1M7.1

2022 M6.9M6.9

1929 M6.8M6.8

1995 M6.8M6.8

2005 M6.8M6.8

1973 M6.8M6.8

1992 M6.8M6.8

1915 M6.8M6.8

1918 M6.7M6.7

2003 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.0 2023-08-17	2023-08-17 16:41	10 km	central Mid-Atlantic Ridge
M6.9 2022-09-04	2022-09-04 09:42	10 km	central Mid-Atlantic Ridge
M6.2 2022-02-08	2022-02-08 11:59	10 km	central Mid-Atlantic Ridge
M6.0 2018-07-23	2018-07-23 10:35	10 km	central Mid-Atlantic Ridge
M7.1 2016-08-29	2016-08-29 04:29	10 km	north of Ascension Island
M6.4 2009-12-09	2009-12-09 16:00	10 km	central Mid-Atlantic Ridge
M6.0 2008-08-11	2008-08-11 23:38	13 km	central Mid-Atlantic Ridge
M6.2 2007-07-31	2007-07-31 22:55	11 km	north of Ascension Island
M6.8 2005-01-12	2005-01-12 08:40	10 km	central Mid-Atlantic Ridge
M6.6 2003-12-21	2003-12-21 07:40	10 km	central Mid-Atlantic Ridge

Energy ratio uses the rule that one magnitude unit is about 32 times the energy. Magnitudes and locations are USGS values and can differ from national agencies. Older records are less complete and less precise.