According to the Philippine Institute of Volcanology and Seismology, the first quake, with a magnitude of 4.3, was located off Naval, Biliran Island and hit the area at 6:29 a.m. It was felt at intensity 4 in Naval, intensity 3 at Leyte and intensity 2 at Capoocan and Jaro, Leyte.
Another 4.0-magnitude quake followed a few hours later, at 9:03 am. Its epicenter was 227 km Southeast of General Santos City.
The third tremor was recorded off Cagayan de Oro City at 1:32 p.m. It has a magnitude of 4 and was felt at Intensity 3 in Tagoloan, Misamis Oriental and Intensity 2 in Cagayan de Oro City.