List of Indonesian Regions at Tsunami Risk Following M 7.7 Philippines Earthquake

A tectonic earthquake with an updated magnitude of M 7.7 struck the southern coast of Mindanao, Philippines, on Monday (8/6) at approximately 06:37 WIB, triggering early tsunami warnings in several regions of Indonesia. The earthquake’s epicentre was located at coordinates 5.80°N; 125.14°E, specifically in the sea at a distance of 244 km northwest of Karatung Island, North Sulawesi, at a depth of 47 km.

“Considering the location of the epicentre and the depth of the hypocentre, this earthquake is a shallow earthquake caused by plate subduction activity,” said Wijayanto, Director of Earthquakes and Tsunamis at BMKG, on Monday (8/6/2026). Analysis of the source mechanism indicates a thrust fault movement, which carries the potential for a tsunami, placing several regions under ‘SIAGA’ (Alert) status.

Modeling results show that the earthquake has the potential to cause tsunamis, with ‘SIAGA’ status issued for Minahasa, Bolaangmongondow, Manado, North Minahasa, South Minahasa, Buol, Sangihe Islands, Gorontalo, Talaud Islands, Minahasa Islands, Toli-toli, Palu, Donggala, Ternate, and Bitung. Additionally, a ‘WASPADA’ (Warning) status has been issued for Tidore, Bulungan, Nunukan, Halmahera, Tarakan, North Halmahera, East Kutai, South Minahasa, Bontang, and Berau.

As of 07:00 WIB, Wijayanto stated that BMKG monitoring had detected at least one aftershock with a maximum magnitude of 6.7. BMKG also released a detailed list of affected areas via their X account, specifying estimated arrival times for waves in various coastal regions across North Sulawesi, Gorontalo, Central Sulawesi, North Maluku, and East Kalimantan.