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.

Iran reviewing US proposal to end war although key demands remain unaddressed
Israeli strikes kill five, injure son of Hamas chief in Gaza
Israel strikes Beirut for first time since ceasefire
US and Iran closing in on memorandum to end war, sources say
Trump defends higher ballroom costs, targets less than $400 million
