No changes in ocean level were detected, and there were no reports of significant damage or injuries due to the quake.
More than 30 aftershocks kept residents on edge for several hours after the initial jolt.
The U.S. Geological Survey said the main quake struck at 4:47 a.m. local time about 350 miles south-southeast of Manila at a depth of about 8 miles.
Shaking was felt most strongly in Sipalay City, in the province of Negros Occidental.