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M6.6 earthquake, Vanuatu, 1999-08-22

MagnitudeM6.6mwc

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Depth33 km

Time (UTC)1999-08-22 12:40

Rank in 199931 / 135among M6+

Rank since 19003609 / 14,458

Energy vs an M6×8approx.

66 km E of Lakatoro, Vanuatu · -16.12, 168.04

M6.5+ within 300 km (largest first)

1950 M7.9M7.9

1965 M7.7M7.7

1965 M7.6M7.6

1999 M7.5M7.5

1973 M7.5M7.5

1910 M7.4M7.4

1965 M7.4M7.4

1961 M7.3M7.3

1905 M7.3M7.3

1911 M7.3M7.3

2010 M7.3M7.3

2024 M7.3M7.3

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.0 1999-02-14	1999-02-14 21:12	10 km	89 km NE of Norsup, Vanuatu
M6.0 1998-12-14	1998-12-14 19:35	140 km	25 km E of Port-Olry, Vanuatu
M6.0 1998-11-14	1998-11-14 15:03	115 km	33 km ENE of Port-Olry, Vanuatu
M6.1 1998-07-18	1998-07-18 16:41	33 km	71 km SSW of Port-Vila, Vanuatu
M7.0 1997-11-15	1997-11-15 18:59	123 km	34 km ESE of Port-Olry, Vanuatu
M6.0 1997-08-17	1997-08-17 20:11	26 km	35 km NNW of Sola, Vanuatu
M6.7 1996-03-17	1996-03-17 14:48	164 km	44 km NNE of Port-Olry, Vanuatu
M6.4 1995-08-31	1995-08-31 17:10	17 km	86 km WSW of Luganville, Vanuatu
M6.2 1994-10-01	1994-10-01 17:46	33 km	51 km W of Port-Vila, Vanuatu
M6.5 1994-10-01	1994-10-01 16:35	17 km	67 km W of Port-Vila, 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.