MANILA, Philippines — A magnitude 4.2 earthquake shook Canlaon City in Negros Oriental on Wednesday, the Philippine Institute of Volcanology and Seismology (Phivolcs) said. According to Phivolcs, the earthquake happened at 3:58 a.m. It was volcanic-tectonic in origin and had a depth of focus of one kilometer. The epicenter was located northwest of Canlaon City. Phivolcs