JAKARTA, Indonesia – A powerful earthquake has struck waters off the Solomon Islands in the South Pacific. There are no immediate reports of damage or injuries and no tsunami is expected.

The U.S. Geological Survey says the 6.6-magnitude quake struck 19 miles (31 kilometers) beneath the ocean floor.

It says the earthquake was 80 miles (129 kilometers) west of the island chain's Kira Kira island.

The agency said Monday a tsunami is not expected.

Papua New Guinea lies on the "Ring of Fire" — an arc of earthquake and volcanic zones that stretches around the Pacific Rim and where about 90 percent of the world's quakes occur.