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M7.1 earthquake, Vanuatu, 2011-08-20

MagnitudeM7.1mww

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Depth28 km

Time (UTC)2011-08-20 18:19

Rank in 201113 / 207among M6+

Rank since 19001226 / 14,458

Energy vs an M6×45approx.

64 km S of Port-Vila, Vanuatu · -18.31, 168.22

M5.5+ within 100 km in the next 30 days

Event	Time (UTC)	Depth	Place
M5.6 2011-08-21	2011-08-21 00:23	35 km	73 km SW of Port-Vila, Vanuatu
M5.5 2011-08-21	2011-08-21 02:09	35 km	96 km S of Port-Vila, Vanuatu
M6.2 2011-08-24	2011-08-24 23:06	13 km	77 km SW of Port-Vila, Vanuatu
M5.5 2011-08-25	2011-08-25 14:23	35 km	95 km SW of Port-Vila, Vanuatu
M5.8 2011-09-11	2011-09-11 23:37	29 km	79 km SW of Port-Vila, Vanuatu

M6.5+ within 300 km (largest first)

1920 M8.1M8.1

1950 M7.9M7.9

1910 M7.8M7.8

1913 M7.6M7.6

1965 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
M6.5 2011-08-20	2011-08-20 17:13	35 km	65 km SSW of Port-Vila, Vanuatu
M7.2 2011-08-20	2011-08-20 16:55	32 km	71 km SSW of Port-Vila, Vanuatu
M6.8 2011-05-10	2011-05-10 08:55	11 km	124 km NE of Wé, New Caledonia
M6.2 2011-03-17	2011-03-17 02:48	17 km	72 km NW of Port-Vila, Vanuatu
M7.0 2011-01-13	2011-01-13 16:16	9 km	118 km NNE of Tadine, New Caledonia
M6.1 2011-01-09	2011-01-09 17:21	18 km	124 km WNW of Isangel, Vanuatu
M6.5 2011-01-09	2011-01-09 10:03	22 km	110 km WNW of Isangel, Vanuatu
M6.4 2010-12-29	2010-12-29 06:54	16 km	120 km W of Isangel, Vanuatu
M6.0 2010-12-26	2010-12-26 02:13	13 km	105 km W of Isangel, Vanuatu
M7.3 2010-12-25	2010-12-25 13:16	16 km	141 km W 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.