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M6.6 earthquake, Tonga, 1983-06-01

MagnitudeM6.6mw

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Depth180 km

Time (UTC)1983-06-01 01:59

Rank in 198336 / 136among M6+

Rank since 19003483 / 14,458

Energy vs an M6×8approx.

147 km SW of Hihifo, Tonga · -17.04, -174.60

M6.5+ within 300 km (largest first)

1919 M8.1M8.1

1917 M8.0M8.0

1975 M7.8M7.8

1981 M7.7M7.7

1977 M7.6M7.6

2023 M7.6M7.6

2026 M7.5M7.5

1995 M7.4M7.4

1921 M7.4M7.4

1907 M7.3M7.3

1987 M7.3M7.3

1906 M7.2M7.2

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.5 1983-05-15	1983-05-15 00:24	33 km	168 km NW of Pangai, Tonga
M6.4 1983-01-08	1983-01-08 11:21	33 km	Tonga
M6.3 1982-09-04	1982-09-04 02:08	33 km	97 km NE of Hihifo, Tonga
M6.3 1982-09-03	1982-09-03 23:39	33 km	105 km NE of Hihifo, Tonga
M6.3 1982-06-11	1982-06-11 00:38	123 km	123 km NNW of Neiafu, Tonga
M6.4 1982-06-02	1982-06-02 12:37	33 km	169 km ENE of Neiafu, Tonga
M6.0 1982-04-16	1982-04-16 14:04	33 km	88 km ENE of Hihifo, Tonga
M7.7 1981-09-01	1981-09-01 09:29	25 km	133 km NE of Hihifo, Tonga
M6.0 1981-06-01	1981-06-01 14:07	33 km	31 km SE of Hihifo, Tonga
M6.3 1980-12-15	1980-12-15 08:12	33 km	213 km ENE of Neiafu, 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.