The quake's epicentre was traced at 130 kilometres north-northeast of Tuguegarao city on Luzon island, the Philippine Institute of Volcanology and Seismology said.
"We have not reports of any damage, but we are monitoring," Reynaldo Ancioquia, a researcher at the Institute told AFP. Seismologists at the USGS put the depth of the quake at 29 kilometres, and reported a magnitude of 5.8.