A MAGNITUDE 5.1 earthquake shook parts of eastern and northern Mindanao Sunday afternoon, with aftershock expected but no immediate reports of serious injury or damage. The Philippine Institute of Volcanology and Seismology (Phivolcs) recorded the tremor at 3:14 p.m. with epicenter east of Bayabas town in Surigao del Sur province. Various intensities were felt in areas along the southern mainland’s eastern areas and in the northern Mindanao province of Misamis Oriental.