Manila: A strong 6.1-magnitude quake struck off the southern Philippines on Friday, the US Geological Survey said.
There were no immediate reports of damage or casualties after the undersea quake struck at 2:43 pm (0643) GMT some 62 kilometres (38.5 miles) northeast of Surigao city on Mindanao island.
The Philippine Institute of Volcanology and Seismology said the quake occurred at a depth of 26 kilometres and was felt on Mindanao`s northeast tip as well as on nearby Leyte island.
The Philippines is regularly hit by quakes due to its location along the so-called chain of fire of islands of the Pacific Ocean that were created by volcanic activity.