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M7.0 earthquake, Tonga, 1978-06-17

MagnitudeM7.0ms

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Depth33 km

Time (UTC)1978-06-17 15:11

Rank in 197810 / 90among M6+

Rank since 19001475 / 14,458

Energy vs an M6×32approx.

206 km SE of Hihifo, Tonga · -17.10, -172.26

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

1907 M7.3M7.3

1987 M7.3M7.3

2022 M7.3M7.3

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1978-06-11	1978-06-11 14:27	33 km	80 km NNE of Hihifo, Tonga
M6.2 1978-03-03	1978-03-03 10:48	33 km	79 km NNE of Hihifo, Tonga
M6.0 1977-09-13	1977-09-13 00:21	33 km	77 km NE of Hihifo, Tonga
M6.3 1977-08-11	1977-08-11 01:42	57 km	127 km NNW of Neiafu, Tonga
M6.2 1977-07-24	1977-07-24 06:22	33 km	96 km NE of Hihifo, Tonga
M7.6 1977-04-02	1977-04-02 07:15	33 km	199 km ESE of Hihifo, Tonga
M7.8 1975-12-26	1975-12-26 15:56	33 km	146 km ESE of Hihifo, Tonga
M6.2 1975-12-09	1975-12-09 09:14	33 km	130 km SSW of Gataivai, Samoa
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

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.