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M7.4 earthquake, Tonga, 1921-02-27

MagnitudeM7.4mw

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Depth15 km

Time (UTC)1921-02-27 18:23

Rank in 19214 / 61among M6+

Rank since 1900633 / 14,458

Energy vs an M6×122approx.

103 km ESE of Neiafu, Tonga · -18.90, -173.04

M6.5+ within 300 km (largest first)

1919 M8.1M8.1

2006 M8.0M8.0

1903 M8.0M8.0

1975 M7.8M7.8

1913 M7.8M7.8

1977 M7.6M7.6

1948 M7.5M7.5

2026 M7.5M7.5

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
M6.6 1919-05-02	1919-05-02 02:07	25 km	151 km S of Hihifo, Tonga
M8.1 1919-04-30	1919-04-30 07:17	25 km	1919 Tonga Earthquake
M6.2 1919-04-23	1919-04-23 07:05	35 km	66 km WNW of Pangai, Tonga
M6.3 1918-10-14	1918-10-14 12:00	30 km	96 km SSE of Pangai, Tonga
M6.5 1917-06-24	1917-06-24 19:48	35 km	77 km SSW of Pangai, Tonga
M6.8 1914-12-20	1914-12-20 14:09	35 km	100 km SE of Hihifo, Tonga
M7.8 1913-06-26	1913-06-26 04:57	25 km	111 km SSE of Pangai, Tonga
M6.9 1913-05-08	1913-05-08 18:35	170 km	127 km S of Hihifo, Tonga
M7.3 1907-01-02	1907-01-02 11:56	30 km	85 km ESE of Neiafu, Tonga
M7.2 1906-12-19	1906-12-19 01:14	35 km	108 km SE 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.