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M6.9 earthquake, Tonga, 1923-06-18

MagnitudeM6.9mw

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Depth15 km

Time (UTC)1923-06-18 08:15

Rank in 192323 / 93among M6+

Rank since 19002076 / 14,458

Energy vs an M6×20approx.

171 km WNW of Neiafu, Tonga · -17.94, -175.43

M6.5+ within 300 km (largest first)

2018 M8.2M8.2

2006 M8.0M8.0

1903 M8.0M8.0

1950 M7.8M7.8

2023 M7.6M7.6

2026 M7.5M7.5

1921 M7.4M7.4

1907 M7.3M7.3

1906 M7.2M7.2

1911 M7.2M7.2

1907 M7.2M7.2

1984 M7.2M7.2

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.6 1922-01-22	1922-01-22 03:23	15 km	110 km NW of Pangai, Tonga
M6.2 1921-11-29	1921-11-29 22:46	15 km	156 km NE of Neiafu, Tonga
M7.4 1921-02-27	1921-02-27 18:23	15 km	103 km ESE of Neiafu, Tonga
M6.3 1919-05-08	1919-05-08 10:08	15 km	292 km S of Alo, Wallis and Futuna
M6.6 1919-05-02	1919-05-02 02:07	25 km	151 km S of Hihifo, Tonga
M6.2 1919-04-23	1919-04-23 07:05	35 km	66 km WNW of Pangai, Tonga
M6.5 1917-06-24	1917-06-24 19:48	35 km	77 km SSW of Pangai, Tonga
M6.5 1916-10-11	1916-10-11 18:05	15 km	166 km WNW of Hihifo, Tonga
M6.8 1914-12-20	1914-12-20 14:09	35 km	100 km SE of Hihifo, Tonga
M6.9 1913-05-08	1913-05-08 18:35	170 km	127 km S 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.