Magnitude 6.3 quake strikes off Vanuatu

A 6.3 magnitude quake has struck northeast of Vanuatu at a depth of 10km, the US Geological Survey says.

An earthquake with a magnitude of 6.3 has struck northeast of the Vanuatu chain of islands. (AAP)

An earthquake with a magnitude of 6.3 has struck northeast of the Vanuatu chain of islands, the US Geological Survey says.

The quake on Saturday had a depth of 10km, it said.