By Mike Crismundo BUTUAN CITY - Five mild tectonic earthquakes jolted Cotabato province anew, the Philippine Institute of Volcanology and Seismology (Phivolcs) said. The tremors did not inflict any damage or injury, the state agency said. In its bulletin, Phivolcs said a 3.1 magnitude earthquake was recorded at 4:44 a.m. on Wednesday, Nov. 6. The epicenter was plotted only 4 kilometers northwest from Makilala town, North Cotabato province, it said. The earthquake had a depth of 23 km, the state agency said. Earlier, another 3.1 magnitude tectonic tremor was registered at 4:16 a.m. on the same day. The epicenter was registered 18 km southeast of the nearby town of Tulunan, with a depth of 17 km., Phivolcs said. At 3:58 a.m. on the same day (Nov. 6), a 3.6 magnitude earthquake was also recorded and its epicenter was traced 11 km southwest also of Makilala town of that same province, with a depth of 25 km, the state agency said. Another 3.5 magnitude tremor was registered at 3:49 a.m. The epicenter was located 18 km southeast of Tulunan (Cotabato), with a depth of 21 km. Earlier, a 2.9 magnitude earthquake was also recorded at 3:15 a.m. and its epicenter was pinpointed 13 km southeast also of Tulunan town, with a depth of 30 km. The regional offices of the Southern and Central Mindanao Offices of Civil Defense also reported no damage or injury when these new five mild tremors struck the province.