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M6.9 earthquake, Tonga, 1990-06-23

MagnitudeM6.9mw

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Depth180 km

Time (UTC)1990-06-23 21:38

Rank in 199020 / 153among M6+

Rank since 19001894 / 14,458

Energy vs an M6×22approx.

139 km WSW of Haveluloto, Tonga · -21.57, -176.48

M6.5+ within 300 km (largest first)

2006 M8.0M8.0

1903 M8.0M8.0

1997 M7.8M7.8

1950 M7.8M7.8

1913 M7.8M7.8

2009 M7.6M7.6

1948 M7.5M7.5

1962 M7.5M7.5

1957 M7.4M7.4

1996 M7.4M7.4

2013 M7.4M7.4

1937 M7.3M7.3

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1989-04-16	1989-04-16 19:48	610 km	Fiji region
M6.0 1989-03-30	1989-03-30 20:39	230 km	158 km W of Pangai, Tonga
M6.4 1988-07-19	1988-07-19 01:00	137 km	76 km WNW of Pangai, Tonga
M6.6 1988-03-10	1988-03-10 10:25	623 km	Fiji region
M6.4 1988-01-15	1988-01-15 08:40	214 km	90 km WNW of Haveluloto, Tonga
M6.0 1987-12-11	1987-12-11 02:03	37 km	92 km S of ‘Ohonua, Tonga
M6.1 1987-08-26	1987-08-26 06:56	569 km	Fiji region
M6.1 1987-03-26	1987-03-26 18:32	81 km	51 km E of ‘Ohonua, Tonga
M6.6 1987-03-19	1987-03-19 22:51	214 km	127 km NW of Nuku‘alofa, Tonga
M6.2 1987-03-13	1987-03-13 08:21	32 km	south of the Fiji Islands

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.