A magnitude 4.9 earthquake struck waters off Surigao del Sur on Sunday morning, Oct. 24, said the Philippine Institute of Volcanology and Seismology (Phivolcs).
Phivolcs detected the tremor at around 7:08 a.m.
It was initially measured at magnitude 5.3 but Phivolcs later revised it to magnitude 4.9.
Phivolcs traced the epicenter of the earthquake at 105 kilometers (km) northeast of Hinatuan, Surigao del Sur with a depth of 16 kilometers.
It was felt as a "weak" tremor at Intensity III in Lingig, Surigao del Sur.
The 4.9-magnitude earthquake was followed by a 3.4-magnitude quake at around 7:13 a.m. that originated at 110 km northeast of Hinatuan, Surigao del Sur.
Phivolcs said the earthquakes were tectonic in origin, which means they were caused by the movement of an active fault near the area.
It does not expect damage to property but aftershocks may occur due to these earthquakes.