Situated on the western fringes of the Pacific Ring of Fire , the Philippines experiences frequent seismic and volcanic activity . The Benham Plateau to the east in the Philippine Sea is an undersea region active in tectonic subduction . Around 20 earthquakes are registered daily , though most are too weak to be felt . The last major earthquake was the 1990 Luzon earthquake
1990 Luzon earthquake
1990 Luzon earthquake
Philippines