An earthquake with a preliminary magnitude of 7.0 struck Sunday morning off the southern tip of the South Pacific archipelago of Vanuatu, the U.S. Geological Survey said.
The quake struck about 75 miles (122 km) southeast of Isangel, the administrative capital of the island of Tanna, and 134 miles (217 km) northeast of New Caledonia's Loyalty Islands.
A tsunami alert has not been issued for the South Pacific or the U.S. western coast.
A strong earthquake rattled Vanuatu in the southern Pacific on Wednesday, the U.S. Geological Survey reports.
The epicenter for the magnitude 6.6 quake was about 72 miles west of Isangel at a depth of 31 kilometers (19 miles).
There were no immediate reports of damage. No tsunami warning was issued.
A stronger earthquake struck the island Sunday.