INDOPOSCO.ID – Mount Anak Krakatau in the Sunda Strait remains at Level III (Alert), according to an analysis by the Geological Agency as of Friday (Sept. 11, 2026). Although the volcano’s continuous eruptive phase has ended, volcanic activity at its active crater remains fluctuating, with limited Strombolian-type eruptions still occurring.
A continuous eruption refers to eruptive activity that persists uninterrupted over an extended period. Strombolian eruptions, meanwhile, occur episodically in the form of separate explosive events. Therefore, the end of continuous eruptions does not mean that all eruptive activity has ceased.
In terms of seismic activity, volcanic earthquakes associated with shallow volcanic activity, including Low-Frequency and Hybrid/Multiphase earthquakes, remain fluctuating but have shown a declining trend since the continuous eruptive phase ended.
Berton SP Panjaitan, Acting Head of the Data, Information and Disaster Communications Center at the National Disaster Management Agency (BNPB), urged people living around Mount Anak Krakatau, including visitors and tourists, not to enter or conduct activities within a 3-kilometer radius of the volcano’s activity center.
“People should also remain highly alert to the potential for hot clouds, lava flows, incandescent rock ejecta and heavy ashfall,” Berton said in a statement issued in Jakarta on Friday (Sept. 11, 2026).
Meanwhile, a joint Search and Rescue (SAR) team continued efforts to locate eight people whose whereabouts remain unknown after they lost contact in the waters of the Sunda Strait. The group consisted of five journalists, two crew members and one guide.
The search operation was being conducted by sea and air. At sea, the search area south of Mount Anak Krakatau had been expanded to approximately 20 nautical miles (NM) from the volcano’s activity center.
“The search area was then expanded northward, taking into account currents, wave movements and wind direction, including into the waters off Lampung,” Berton said.
Aerial search efforts were also supported by helicopters. Drones were additionally deployed to assist visual monitoring in several areas targeted in the search. (dan)
