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.

Putin and Modi discuss trade, peace in New Delhi summit
Indian air travel crippled as IndiGo's pilot crisis enters fourth day
Lebanon says ceasefire talks aim primarily at halting Israel's hostilities
US to widen travel ban to more than 30 countries, Noem says
Putin visits Delhi as Russia, India seek to increase and diversify trade
