MANILA – A magnitude 5.1 earthquake shook San Luis, Aurora, the Philippine Institute of Volcanology and Seismology said Saturday. According to state seismology bureau, the quake’s epicenter was located 16 kilometers southwest of the municipality. Intensity 6 was felt in Baler, Aurora while Intensity 5 was felt in the province’s municipalities of Dipaculao and Maria Aurora. The other reported intensities …