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M7.5 earthquake, Vanuatu, 1973-12-28

MagnitudeM7.5ms

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Depth26 km

Time (UTC)1973-12-28 13:41

Rank in 19733 / 93among M6+

Rank since 1900459 / 14,458

Energy vs an M6×178approx.

81 km NW of Port-Olry, Vanuatu · -14.46, 166.60

M6.5+ within 300 km (largest first)

1980 M7.9M7.9

1957 M7.8M7.8

1966 M7.8M7.8

2009 M7.8M7.8

1934 M7.7M7.7

1965 M7.7M7.7

1997 M7.7M7.7

2009 M7.7M7.7

1965 M7.6M7.6

1999 M7.5M7.5

1980 M7.5M7.5

1973 M7.5M7.5

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.0 1973-11-30	1973-11-30 08:09	124 km	38 km ESE of Port-Olry, Vanuatu
M6.4 1973-10-09	1973-10-09 07:57	9 km	52 km SW of Sola, Vanuatu
M6.1 1973-08-01	1973-08-01 01:31	200 km	52 km SW of Sola, Vanuatu
M6.4 1973-04-08	1973-04-08 12:41	35 km	29 km SSE of Luganville, Vanuatu
M6.1 1973-01-06	1973-01-06 15:52	36 km	85 km WNW of Port-Olry, Vanuatu
M6.5 1972-09-04	1972-09-04 18:11	68 km	131 km SSE of Lata, Solomon Islands
M6.0 1972-09-01	1972-09-01 12:47	122 km	35 km E of Port-Olry, Vanuatu
M6.7 1972-05-04	1972-05-04 07:48	54 km	21 km ENE of Norsup, Vanuatu
M6.5 1972-04-02	1972-04-02 21:30	10 km	170 km WNW of Sola, Vanuatu
M6.1 1972-01-24	1972-01-24 03:55	51 km	145 km WNW of Sola, Vanuatu

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.