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M6.6 earthquake, Tonga, 1948-06-29

MagnitudeM6.6mw

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Depth35 km

Time (UTC)1948-06-29 10:28

Rank in 194830 / 114among M6+

Rank since 19003942 / 14,458

Energy vs an M6×7approx.

124 km ENE of Hihifo, Tonga · -15.38, -172.80

M6.5+ within 300 km (largest first)

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

1987 M7.3M7.3

1984 M7.2M7.2

2000 M7.2M7.2

1957 M7.1M7.1

1978 M7.0M7.0

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1947-12-31	1947-12-31 15:06	15 km	101 km NNE of Hihifo, Tonga
M6.2 1947-09-04	1947-09-04 00:30	15 km	145 km NE of Hihifo, Tonga
M6.3 1946-04-23	1946-04-23 10:40	35 km	97 km NNE of Hihifo, Tonga
M6.4 1944-10-11	1944-10-11 09:45	15 km	188 km SW of Vailoatai, American Samoa
M6.4 1943-09-11	1943-09-11 19:34	10 km	28 km E of Hihifo, Tonga
M6.3 1942-12-22	1942-12-22 04:14	15 km	115 km W of Hihifo, Tonga
M6.4 1941-10-05	1941-10-05 10:11	15 km	132 km SW of Gataivai, Samoa
M6.0 1940-08-24	1940-08-24 13:31	15 km	106 km ESE of Hihifo, Tonga
M6.3 1940-08-11	1940-08-11 16:46	15 km	136 km SW of Asau, Samoa
M6.4 1940-07-20	1940-07-20 01:53	15 km	111 km ENE 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.