MANILA, Philippines— A magnitude 4.3 earthquake shook the province of Samar on Saturday evening, the Philippine Institute of Volcanology and Seismology (Phivolcs) said. In its latest bulletin, the Phivolcs said the tremor occurred at 7:52 p.m., and it was tectonic in origin. READ: Magnitude 6.1 earthquake hits waters off Davao Occidental The quake’s epicenter was