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M7.2 earthquake, Tonga, 1911-08-21

MagnitudeM7.2mB

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Depth230 km

Time (UTC)1911-08-21 16:28

Rank in 191112 / 42among M6+

Rank since 1900879 / 14,458

Energy vs an M6×63approx.

241 km WNW of Houma, Tonga · -20.00, -177.26

M6.5+ within 300 km (largest first)

2018 M8.2M8.2

1903 M8.0M8.0

1997 M7.8M7.8

1919 M7.8M7.8

1950 M7.8M7.8

2002 M7.7M7.7

1909 M7.6M7.6

1994 M7.6M7.6

2026 M7.5M7.5

1962 M7.5M7.5

1957 M7.4M7.4

1996 M7.4M7.4

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.2 1910-12-14	1910-12-14 20:46	440 km	280 km WNW of Houma, Tonga
M7.4 1910-08-21	1910-08-21 05:38	550 km	227 km E of Levuka, Fiji
M7.0 1910-04-20	1910-04-20 22:22	350 km	254 km WNW of Houma, Tonga
M7.6 1909-02-22	1909-02-22 09:21	550 km	178 km E of Levuka, Fiji
M7.2 1907-03-31	1907-03-31 22:00	360 km	Fiji region
M6.9 1905-02-27	1905-02-27 17:24	35 km	15 km WSW of Pangai, Tonga
M7.1 1903-04-29	1903-04-29 03:59	–	Tonga
M8.0 1903-01-04	1903-01-04 05:07	400 km	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.