Manila: Three earthquakes measuring 6.6, 3.3, and 4.5 on the Richter scale, hit southern and northern Luzon, on Sunday and Monday, respectively, the Philippine Institute of Volcanology and Seismology (Phivolcs) said. No casualties or damage to property were reported.

A temblor measuring 4.5 on the Richter scale hit 18 kilometres southeast of Laoag City, in northern Philippines, at 12.28om on Monday, Phivolcs said.

A weaker earthquake measuring 3.3 occurred 8 kilometres southeast of Cateel, Davao Oriental, in the southern Philippines at 5.48am on Monday, Phivolcs said.

A strong earthquake measuring 6.6 hit the south earliest, 390 kilometres southeast of Sarangani, Davao del Sur, at 11.05pm on Sunday, Phivolcs added.

The strong quake was of Intensity 4 in Davao City; Intensity 3 in General Santos City, and Intensity 2 in Koronadal City, Tupi, and Polomolok town in south Cotabato province.

The Philippines is part of Asia Pacific’s Ring of Fire where earthquakes and typhoons occur often.