The Philippine Institute of Volcanology and Seismology (Phivolcs) reports a series of earthquakes and aftershocks affecting areas in and around Mindanao following a June 8, 2026 magnitude 7.8 offshore earthquake near Sarangani. On Saturday morning, a magnitude 5.7 earthquake struck off Balut Island in Sarangani, Davao Occidental, described as an aftershock of the June 8 event; Phivolcs attributed it to a tectonic source and gave a depth of 10 km. On Sunday morning, Phivolcs recorded another aftershock in Sarangani at magnitude 4.9. Its epicenter was southeast of Balut Island and Phivolcs initially logged it at 5.2 before downgrading it to 4.9; the reported depth was 33 km. On Thursday morning (June 11), a magnitude 5.5 aftershock hit about 67 km southwest of Balut Island, with a depth of 10 km. Separately, Phivolcs also logged a magnitude 6.6 earthquake in Davao Oriental on Monday evening, described as tectonic, with an epicenter about 164 km east of Gen. Generoso and a depth of 86 km. Another aftershock on Wednesday afternoon in Sarangani was recorded at magnitude 4.6 with reported intensities across nearby cities and towns.