BNPB: Level Three Alert Status for Anak Krakatau Remains in Effect

The National Disaster Management Agency (BNPB) has emphasised that the activity level of Mount Anak Krakatau in the Sunda Strait remains at Level III (Alert) due to the high probability of subsequent eruptions.

Speaking in Jakarta on Friday, the Acting Head of the BNPB Disaster Data, Information, and Communication Centre, Berton SP Panjaitan, stated that this status is based on a comprehensive analysis by the Geological Agency regarding the volcanic dynamics of Mount Anak Krakatau.

Berton explained that although the period of continuous eruption that lasted for 25 hours since 4 September has ended, Mount Anak Krakatau has now transitioned into an episodic Strombolian eruption phase, with 14 instances recorded up until Friday morning.

From the evaluation of seismicity, while shallow volcanic earthquakes have been observed to decrease, deep volcanic earthquakes have actually increased, indicating that the supply of magma from depth is still ongoing.

Observations conducted on 10-11 September 2026 recorded one eruption earthquake, 21 low-frequency earthquakes, 13 hybrid earthquakes, 28 shallow volcanic earthquakes, 18 deep volcanic earthquakes, and continuous tremors.

The hazards that the public must remain vigilant against currently include the projection of incandescent rocks, heavy ashfall, and the potential for lava flows should continuous eruptions resume.

In consideration of the Level III Alert status, the BNPB reminds the public, tourists, and climbers that all activities within a 3-kilometre safety radius from the active crater are strictly prohibited.

Furthermore, the BNPB has urged residents in the coastal areas of Banten and Lampung to remain calm, continue their normal activities, and disregard tsunami rumours associated with the eruption of Mount Anak Krakatau unless they originate from official government channels.