By Mike Crismundo BUTUAN CITY - A 4.7-magnitude earthquake struck Central Mindanao before midnight Monday, November 12, the Philippine Institute of Volcanology and Seismology (Phivolcs) said. The Central Mindanao Office of Civil Defense (OCD) and provincial disaster risk reduction and management council there reported no damage or injuries after the Monday night tremor that struck Sultan Kudarat province. In its bulletin, Phivolcs said the tremor was registered at 10:49 p.m., with the epicenter located 27 kilometers (km) southwest of Kalamansig, Sultan Kudarat. The tremor had a depth of only 1 km. In its instrumental intensity, Phivolcs said Intensity 1 was also recorded in nearby Tupi, South Cotabato province. The earthquake was tectonic in origin, the state agency said. In its latest bulletin, Phivolcs also recorded four mild tectonic earthquakes at dawn November 13 in the same place and province. The strongest was 2.7 magnitude tremor that registered at 1:44 a.m., with a depth of 6 km, and the weakest was magnitude 2.0 quake that recorded at 1:27 a.m., with also a shallow depth of 1 km, and located 25 km southwest and 20 km southeast of Kalamansig town, respectively, Phivolcs said. Meanwhile, a mild 3.2 magnitude tectonic earthquake also registered at 1:27 a.m. today (Nov. 13) and its epicenter was plotted 43 km northeast of Pacific Ocean facing town of Burgos, Siargao Island, Surigao del Norte province, with a depth of 14 km. No aftershock or tsunami alert was raised by the state agency. The municipal and provincial disaster risk reduction and management councils there also reported no damage or injury.