A magnitude 5.0 earthquake struck offshore Davao Occidental on Sunday afternoon, July 19, as an aftershock of the powerful earthquakes that shook the area in June, the Philippine Institute of Volcanology and Seismology (Phivolcs) said.In its Earthquake Information No. 1, Phivolcs said the tremor occurred at 4:19 p.m., with its epicenter located 40 kilometers southeast of Balut Island in the municipality of Sarangani, Davao Occidental province.Th…