A 4.7 magnitude earthquake struck the southern island of Mindanao at 6:18 p.m. Wednesday, the US Geological Survey said.

There were no immediate reports of damage or injuries.

The undersea quake was located 90 kilometers south-southeast of Hinatuan, in Surigao del Sur province at a depth of 78.7 kilometers.

The Philippines sits on the Pacific "Ring of Fire" where continental plates collide causing frequent seismic and volcanic activity.