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M6.6 earthquake, India, 1973-04-07

MagnitudeM6.6ms

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Depth33 km

Time (UTC)1973-04-07 03:00

Rank in 197318 / 93among M6+

Rank since 19003448 / 14,458

Energy vs an M6×8approx.

Nicobar Islands, India region · 6.97, 91.38

M6.5+ within 300 km (largest first)

2010 M7.5M7.5

2004 M7.2M7.2

2005 M7.2M7.2

1955 M7.0M7.0

1917 M6.8M6.8

2005 M6.7M6.7

2004 M6.6M6.6

1973 M6.6M6.6

1921 M6.6M6.6

1907 M6.5M6.5

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1964-09-15	1964-09-15 15:29	45 km	Nicobar Islands, India region
M6.0 1961-07-11	1961-07-11 09:31	50 km	Nicobar Islands, India region
M7.0 1955-05-17	1955-05-17 14:49	25 km	190 km WNW of Sabang, Indonesia
M6.0 1950-12-22	1950-12-22 09:10	25 km	Nicobar Islands, India region
M6.3 1937-11-30	1937-11-30 00:40	15 km	off the west coast of northern Sumatra
M6.3 1935-11-25	1935-11-25 10:03	35 km	184 km W of Banda Aceh, Indonesia
M6.6 1921-03-05	1921-03-05 06:24	20 km	249 km NW of Sabang, Indonesia
M6.8 1917-01-20	1917-01-20 23:48	15 km	238 km WNW of Sabang, Indonesia
M6.2 1915-08-12	1915-08-12 09:16	15 km	Nicobar Islands, India region
M6.5 1907-11-21	1907-11-21 20:03	15 km	253 km WNW of Sabang, Indonesia

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.