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.

WHO says Congo Ebola outbreak spreads to two new health zones
Congo military plane crash kills 13
Kazakhstan detains defence officials after 14 die during naval exercise
Trump, Xi wrap up summit with tea and tour of US archives
Five missing after explosion collapses building in Athens
