The quake, which was tectonic in origin, had a depth of 36 kilometers. It was recorded 67 kilometers northwest of Alimbang at 2:49 p.m.
It was felt at Intensity IV in Cotabato City; Intensity III in Datu Hoffer and Datu Unsay in Maguindanao; Intensity II in Zamboanga City; Kidapawan City and Isulan, Sultan Kudarat.
No damages were recorded so far but aftershocks were expected, Phivolcs said.
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