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M7.8 earthquake, Tonga, 1975-12-26

MagnitudeM7.8ms

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Depth33 km

Time (UTC)1975-12-26 15:56

Rank in 19754 / 106among M6+

Rank since 1900191 / 14,458

Energy vs an M6×501approx.

146 km ESE of Hihifo, Tonga · -16.26, -172.47

M6.5+ within 300 km (largest first)

1919 M8.1M8.1

2009 M8.1M8.1

1917 M8.0M8.0

1975 M7.8M7.8

1981 M7.7M7.7

1977 M7.6M7.6

2023 M7.6M7.6

1995 M7.4M7.4

1921 M7.4M7.4

1987 M7.3M7.3

1984 M7.2M7.2

2000 M7.2M7.2

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1975-12-09	1975-12-09 09:14	33 km	130 km SSW of Gataivai, Samoa
M6.0 1974-06-04	1974-06-04 04:14	276 km	140 km W of Hihifo, Tonga
M6.0 1974-03-18	1974-03-18 10:56	27 km	136 km SSW of Gataivai, Samoa
M6.2 1973-12-30	1973-12-30 16:21	33 km	103 km NE of Hihifo, Tonga
M6.1 1973-08-05	1973-08-05 15:47	33 km	79 km ESE of Hihifo, Tonga
M6.0 1972-12-22	1972-12-22 16:22	15 km	142 km E of Hihifo, Tonga
M6.2 1972-09-27	1972-09-27 09:01	13 km	203 km ESE of Hihifo, Tonga
M6.1 1972-08-07	1972-08-07 09:24	16 km	209 km ESE of Hihifo, Tonga
M6.0 1972-04-02	1972-04-02 09:01	9 km	87 km E of Hihifo, Tonga
M6.0 1970-08-27	1970-08-27 16:22	10 km	101 km NE of Hihifo, Tonga

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.