A magnitude 6.4 earthquake struck off the province of Davao Occidental in the southern Philippines on Sunday.
The Philippine Institute of Volcanology and Seismology (Phivolcs) upgraded from an initial measurement of magnitude 6.1.
There were no immediate reports of casualties or damage.
The epicentre was 126 km southeast of Jose Abad Santos town, Phivolcs said.

At least 47 dead in eastern Indonesia after magnitude 7.7 quake
Kuwait, Bahrain strongly condemn Iranian attack on ADNOC vessels
Yemen's Mocha port halts operations after Houthi attacks, port director says
Morocco arrests 111 migrants headed for Spain's Ceuta in security crackdown
