The Sunda Strait region has once again come into the spotlight following a double natural phenomenon in the early hours of Wednesday (8/7/2026). In addition to consecutive eruptions from Mount Anak Krakatau, the coastal area of Banten was also shaken by a tectonic earthquake with a magnitude of 5.3.
The Meteorology, Climatology, and Geophysics Agency (BMKG) recorded that the earthquake occurred at 02:44 WIB with the epicenter located 62 kilometers southwest of Sumur, Banten, at a depth of 43 kilometers below sea level. Although the tremors were felt by coastal residents, BMKG confirmed that this event does not have the potential to trigger a tsunami.
Simultaneously with this event, Mount Anak Krakatau showed an increase in volcanic activity. An observer officer from the Center for Volcanology and Geological Hazard Mitigation (PVMBG), Anggi Nuryo Saputro, reported that the volcano had experienced several eruptions since 00:00 WIB. A thick column of volcanic ash was observed rising up to 250 meters above the crater peak.
To date, the status of Mount Anak Krakatau remains at Level III or Alert. Based on the analysis of monitoring data, the eruption is assessed as a form of limited surface energy release, so there is no indication yet of a significant increase in magma pressure from within the volcano.
Nonetheless, PVMBG has issued a strict warning for the public, tourists, and fishermen. All parties are urged not to conduct any activities within a 3-kilometer radius of the active crater to avoid the risk of ejected incandescent material, volcanic ash, and hot clouds that could occur at any time.
The public is asked to remain calm and only refer to official information issued by the Geological Agency of the Ministry of Energy and Mineral Resources (ESDM) or PVMBG. This anticipatory step is expected to minimize risks for residents in the coastal areas of the Sunda Strait and surrounding regions.
