Home › 1973 › central Mid-Atlantic Ridge

M6.8 earthquake, central Mid-Atlantic Ridge, 1973-08-28

MagnitudeM6.8ms

This page is updated only once a day and is not an alert service. For current earthquake and tsunami information, check the Japan Meteorological Agency, the USGS and your local authorities.

Depth33 km

Time (UTC)1973-08-28 15:01

Rank in 197313 / 93among M6+

Rank since 19002290 / 14,458

Energy vs an M6×16approx.

central Mid-Atlantic Ridge · -0.19, -18.03

M6.5+ within 300 km (largest first)

2016 M7.1M7.1

1992 M6.8M6.8

1973 M6.8M6.8

1915 M6.8M6.8

1918 M6.7M6.7

2003 M6.6M6.6

2026 M6.6M6.6

2003 M6.6M6.6

1990 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1970-12-25	1970-12-25 12:53	16 km	central Mid-Atlantic Ridge
M6.1 1965-11-15	1965-11-15 11:18	10 km	central Mid-Atlantic Ridge
M6.2 1965-08-16	1965-08-16 12:36	24 km	central Mid-Atlantic Ridge
M6.2 1958-09-03	1958-09-03 03:44	15 km	north of Ascension Island
M6.5 1954-04-30	1954-04-30 23:04	15 km	central Mid-Atlantic Ridge
M6.4 1953-02-19	1953-02-19 15:17	15 km	north of Ascension Island
M6.5 1946-11-03	1946-11-03 19:32	15 km	north of Ascension Island
M6.0 1941-01-24	1941-01-24 15:35	15 km	central Mid-Atlantic Ridge
M6.3 1940-04-27	1940-04-27 10:33	15 km	central Mid-Atlantic Ridge
M6.2 1939-04-23	1939-04-23 16:23	15 km	north of Ascension Island

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.