Strong Aftershock, Vanuatu

A strong earthquake has struck during the aftershock sequence following yesterday’s magnitude 7.3 earthquake in the New Hebrides region of Vanuatu.

Wednesday 11th August 2010

The U.S. Geological Survey reports a magnitude 6.0 aftershock struck 75 km west-north-west of Port Vila, Vanuatu at 3:35 this afternoon, New Zealand time. The quake, which was 41 km deep, was centred about 30 km north-west of yesterday’s magnitude 7.3 earthquake.

Geoscience Australia reports the quake as magnitude 5.9 at a depth of 0 km. It estimates that the quake would have been felt throughout the New Hebrides group and up to 415 km from the epicentre.

The Pacific Tsunami Warning Centre has not issued a bulletin for this event.

The U.S. Geological Survey has revised its estimate of the magnitude of yesterday’s major quake downward from magnitude 7.5 to magnitude 7.3. Subsequent earthquake activity has been scattered across the seabed around the island of Efate, with eleven events since the major quake. The USGS has reported one quake of magnitude 6, five of 5th magnitude and five of 4th magnitude.

In addition, a magnitude 5.8 quake was recorded 115 km north of Luganville, Espiritu Santo at 11:19 last night.

[Compiled from data supplied by the U.S. Geological Survey and Geoscience Australia and their contributing agencies.]

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