BMKG Confirms Tsunami in North Sulawesi and North Maluku

The Meteorology, Climatology, and Geophysics Agency (BMKG) has confirmed that minor tsunami waves have been detected at three observation locations following a 7.7 magnitude tectonic earthquake that struck the Celebes Sea on Monday (8/6) morning.

BMKG Deputy for Geophysics, Nelly Florida Riama, revealed that based on tide gauge monitoring data, sea level anomalies were recorded between 9 and 18 centimetres. Three coastal areas have detected the arrival of these waves: Ulu Siau (North Sulawesi), Melonguane (North Sulawesi), and one monitoring point in the North Maluku region.

Despite the current wave anomalies being classified as small, BMKG emphasised that the threat has not yet ended. Based on tsunami modelling estimates, the potential peak wave heights in several coastal areas are projected to reach ‘Siaga’ (Alert) to ‘Awas’ (Warning) status. Residents in affected areas are urged not to lower their vigilance and to continue following evacuation instructions from local governments and disaster authorities.

The early tsunami warning was officially issued by BMKG less than 10 minutes after the 7.7 magnitude tectonic earthquake struck at 06:37 WIB. The epicentre was located at a depth of 47 kilometres, specifically northwest of Karatung Island, North Sulawesi, bordering the Mindanao sector of the Philippines.

BMKG, alongside relevant agencies, continues to conduct strict real-time monitoring of tidal data and other tsunami monitoring sensors. This measure is being taken to ensure the safety of coastal regions in northern and eastern Indonesia from the potential of higher subsequent waves. Local governments and the community are advised to continuously monitor data updates through official BMKG channels to obtain accurate and verified information.