BMKG: Philippines Earthquake Triggering Tsunami Caused by Plate Subduction

The Meteorology, Climatology, and Geophysics Agency (BMKG) issued an early tsunami warning following a magnitude 7.7 earthquake in the South Coast Mindanao region, Philippines, on Monday (8/6/2026) at 06:37 WIB. The Director of Earthquakes and Tsunamis at BMKG, Wijayanto, revealed that the earthquake was a shallow-focus event triggered by plate subduction activity. “The results of the source mechanism analysis show an upward movement (thrust fault),” Wijayanto stated during an official online press conference on Monday morning.

According to BMKG modelling, certain areas have been placed on alert status, while other regions remain under a warning status. Tremors from the earthquake were felt strongly in several parts of Eastern Indonesia. In Morotai and North Halmahera, vibrations reached an intensity scale of IV MMI, causing pottery to break and walls to rattle. In Manado, Ternate, and Palu, tremors were felt at a scale of III MMI, noticeable inside houses, similar to the sensation of a heavy truck passing by.

As of 07:11 WIB, BMKG recorded two significant aftershocks with magnitudes of M 6.7 and M 5.9. Currently, there have been no official reports of structural damage caused by the tremors. BMKG has confirmed minor tsunami waves of up to 0.19 metres in Melonguane, Ulu Siau, and Kedi due to the Mindanao earthquake. The public is advised to remain calm, avoid unverified information, and continue monitoring official BMKG communication channels.