A strong 6.1-magnitude quake struck off Surigao City on Friday, the US Geological Survey said.
A magnitude 3.2 aftershock was also felt later in the afternoon.
There were no immediate reports of damage or casualties after the undersea quake struck at 2:43 p.m. some 62 kilometers northeast of Surigao City.
The epicenter was traced northeast of Burgos, Surigao del Norte, according to the bulletin released by the Philippine Institute of Volcanology and Seismology (Phivolcs).
Phivolcs said the quake occurred at a depth of 26 kilometers and was felt in Mindanao’s northeast tip as well as in nearby Leyte.
Susil Ragas of the Philippine Information Agency said there are no reported damages. Robinson Giorgio of Philvolcs Mactan (Cebu), however, said they are still looking into reports of structural cracks in Siargao.
The Philippines is regularly hit by quakes because of its location along the so-called ring of fire of islands of the Pacific Ocean that were created by volcanic activity.
The earthquake was felt at Intensity 5 at Surigao City; General Luna and Bucas Grande, Surigao del Norte; Talacogon, Agusan del Sur; and Carrascal, Surigao del Sur.
It was Intensity 4 at Dinagat Island and Butuan City, Agusan del Sur.
In Tandag, Surigao del Sur, it was Intensity 3 as well as in Balangiga and Guiuan, Eastern Samar; San Juan, Hinunangan and Saint Bernard, Southern Leyte; Tacloban City, Palo and Dulag, Leyte; Lapu Lapu City and Consolacion, Cebu; Gingoog, Misamis Oriental; and Davao City.
It was Intensity 2 in Bislig and Hinatuan, Surigao del Sur; Mambajao, Camiguin; and Cagayan de Oro City, Misamis Oriental.
In Polangco, Zamboanga del Norte and Dipolog City, it was Intensity 1.