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M6.7 earthquake, Macquarie Island, 1977-07-21

MagnitudeM6.7ms

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Depth33 km

Time (UTC)1977-07-21 11:53

Rank in 197719 / 85among M6+

Rank since 19002830 / 14,458

Energy vs an M6×11approx.

Macquarie Island region · -53.86, 158.60

M6.5+ within 300 km (largest first)

1989 M8.0M8.0

1924 M7.7M7.7

1943 M7.5M7.5

1965 M7.3M7.3

2008 M7.1M7.1

1969 M7.0M7.0

1966 M7.0M7.0

2022 M6.9M6.9

1948 M6.9M6.9

2025 M6.8M6.8

1960 M6.8M6.8

1977 M6.7M6.7

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.0 1969-06-17	1969-06-17 23:58	10 km	Macquarie Island region
M7.0 1966-05-25	1966-05-25 13:20	10 km	Macquarie Island region
M7.3 1965-08-02	1965-08-02 13:19	11 km	Macquarie Island region
M6.8 1960-12-13	1960-12-13 07:36	15 km	north of Macquarie Island
M6.9 1948-12-05	1948-12-05 06:26	15 km	Macquarie Island region
M7.5 1943-09-06	1943-09-06 03:41	10 km	Macquarie Island region
M6.4 1935-12-09	1935-12-09 07:23	10 km	Macquarie Island region
M6.1 1933-12-02	1933-12-02 05:17	10 km	Macquarie Island region
M7.7 1924-06-26	1924-06-26 01:37	10 km	Macquarie Island region

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.