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M7.0 earthquake, Tonga, 1972-05-22

MagnitudeM7.0mw

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Depth224 km

Time (UTC)1972-05-22 20:45

Rank in 197213 / 132among M6+

Rank since 19001322 / 14,458

Energy vs an M6×38approx.

146 km NW of Neiafu, Tonga · -17.78, -175.03

M6.5+ within 300 km (largest first)

1919 M8.1M8.1

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

1987 M7.3M7.3

1906 M7.2M7.2

1907 M7.2M7.2

1984 M7.2M7.2

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.1 1972-05-08	1972-05-08 16:15	31 km	182 km W of Pangai, Tonga
M6.0 1972-04-02	1972-04-02 09:01	9 km	87 km E of Hihifo, Tonga
M6.0 1972-03-01	1972-03-01 09:04	10 km	47 km SE of Neiafu, Tonga
M6.2 1970-11-02	1970-11-02 10:13	10 km	236 km W of Hihifo, Tonga
M6.1 1970-07-16	1970-07-16 21:17	15 km	90 km SE of Neiafu, Tonga
M6.2 1969-05-01	1969-05-01 19:05	203 km	123 km SW of Hihifo, Tonga
M6.4 1968-11-24	1968-11-24 21:09	25 km	211 km WNW of Hihifo, Tonga
M6.5 1968-03-11	1968-03-11 08:26	109 km	30 km SSW of Hihifo, Tonga
M6.3 1966-11-05	1966-11-05 12:45	32 km	159 km WNW of Hihifo, Tonga
M6.1 1966-10-08	1966-10-08 02:34	12 km	252 km SSE of Alo, Wallis and Futuna

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.