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M7.6 earthquake, off the west coast of the South Island of New Zealand, 1981-05-25

MagnitudeM7.6ms

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Depth33 km

Time (UTC)1981-05-25 05:25

Rank in 19812 / 83among M6+

Rank since 1900356 / 14,458

Energy vs an M6×251approx.

off the west coast of the South Island of New Zealand · -48.79, 164.36

M6.5+ within 300 km (largest first)

2004 M8.1M8.1

1981 M7.6M7.6

1945 M7.5M7.5

2007 M7.4M7.4

1979 M7.4M7.4

2004 M7.1M7.1

1964 M7.0M7.0

1955 M7.0M7.0

1936 M7.0M7.0

1954 M6.8M6.8

1961 M6.7M6.7

1954 M6.7M6.7

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.4 1979-10-12	1979-10-12 10:25	33 km	180 km W of Riverton, New Zealand
M6.4 1972-04-01	1972-04-01 23:51	10 km	Auckland Islands, New Zealand region
M6.7 1967-09-20	1967-09-20 09:39	18 km	Auckland Islands, New Zealand region
M6.1 1964-11-08	1964-11-08 02:43	15 km	Auckland Islands, New Zealand region
M7.0 1964-09-12	1964-09-12 22:07	25 km	Auckland Islands, New Zealand region
M6.7 1961-03-18	1961-03-18 14:55	15 km	Auckland Islands, New Zealand region
M7.0 1955-01-05	1955-01-05 00:50	15 km	Auckland Islands, New Zealand region
M6.7 1954-01-13	1954-01-13 00:13	15 km	off the west coast of the South Island of New Zealand
M6.8 1954-01-12	1954-01-12 14:20	35 km	off the west coast of the South Island of New Zealand
M6.5 1954-01-12	1954-01-12 14:16	35 km	off the west coast of the South Island of New Zealand

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.