MANILA, Jan. 21 (Xinhua) -- An offshore earthquake with a preliminary magnitude of 7.1 shook Davao Occidental province in the southern Philippines on Thursday, the Philippine Institute of Seismology and Volcanology (Phivolcs) said.
The institute said the quake, which struck at 8:23 p.m. local time, hit at a depth of 116 km, about 231 km southeast of Jose Abad Santos town.
The institute said the quake, which was tectonic in origin, will trigger aftershocks but will not cause damage.
The tremor was also felt in General Santos City, Davao City and Bislig City in Surigao del Sur province, the institute added.
The Philippines has frequent seismic activity due to its location along the Pacific "Ring of Fire." Enditem