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M7.8 earthquake, Tonga, 1997-10-14

MagnitudeM7.8mwb

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Depth167 km

Time (UTC)1997-10-14 09:53

Rank in 19971 / 136among M6+

Rank since 1900198 / 14,458

Energy vs an M6×501approx.

192 km WSW of Haveluloto, Tonga · -22.10, -176.77

M6.5+ within 300 km (largest first)

1903 M8.0M8.0

1950 M7.8M7.8

1997 M7.8M7.8

2002 M7.7M7.7

1963 M7.6M7.6

2009 M7.6M7.6

1962 M7.5M7.5

1957 M7.4M7.4

1996 M7.4M7.4

2013 M7.4M7.4

1937 M7.3M7.3

1944 M7.3M7.3

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.1 1997-09-10	1997-09-10 12:57	10 km	58 km E of ‘Ohonua, Tonga
M6.2 1996-11-14	1996-11-14 13:47	192 km	146 km W of Haveluloto, Tonga
M6.9 1996-10-19	1996-10-19 14:53	591 km	Fiji region
M7.4 1996-08-05	1996-08-05 22:38	550 km	Fiji region
M7.2 1996-04-16	1996-04-16 00:30	111 km	south of the Fiji Islands
M6.2 1995-12-10	1995-12-10 23:46	412 km	299 km W of Haveluloto, Tonga
M6.1 1995-10-29	1995-10-29 19:40	618 km	Fiji region
M6.4 1995-10-06	1995-10-06 11:39	198 km	146 km NNW of Nuku‘alofa, Tonga
M6.1 1995-08-29	1995-08-29 08:51	19 km	64 km ENE of ‘Ohonua, Tonga
M6.4 1995-07-28	1995-07-28 14:29	92 km	19 km W of Haveluloto, 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.