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M6.8 earthquake, Vanuatu, 1987-09-28

MagnitudeM6.8mw

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Depth31 km

Time (UTC)1987-09-28 11:47

Rank in 198727 / 166among M6+

Rank since 19002344 / 14,458

Energy vs an M6×16approx.

79 km SSW of Port-Vila, Vanuatu · -18.41, 168.06

M6.5+ within 300 km (largest first)

1920 M8.1M8.1

1950 M7.9M7.9

1910 M7.8M7.8

1913 M7.6M7.6

1999 M7.5M7.5

1910 M7.4M7.4

1965 M7.4M7.4

1992 M7.4M7.4

1961 M7.3M7.3

2008 M7.3M7.3

2010 M7.3M7.3

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.1 1987-09-28	1987-09-28 07:15	32 km	74 km S of Port-Vila, Vanuatu
M6.9 1987-02-23	1987-02-23 15:49	234 km	57 km ENE of Lakatoro, Vanuatu
M6.4 1987-02-11	1987-02-11 07:56	24 km	25 km N of Norsup, Vanuatu
M6.4 1986-10-25	1986-10-25 20:47	31 km	20 km WNW of Port-Vila, Vanuatu
M6.6 1986-07-16	1986-07-16 12:41	111 km	12 km WNW of Isangel, Vanuatu
M6.1 1986-03-05	1986-03-05 15:47	287 km	87 km NNE of Isangel, Vanuatu
M6.2 1985-10-06	1985-10-06 12:00	272 km	66 km NNE of Isangel, Vanuatu
M6.5 1985-07-03	1985-07-03 15:55	29 km	74 km NW of Port-Vila, Vanuatu
M6.8 1984-04-06	1984-04-06 23:08	182 km	84 km NNW of Isangel, Vanuatu
M6.2 1983-04-17	1983-04-17 14:06	26 km	131 km S of Isangel, 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.