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🇮🇩 Indonesia /Disasters & Emergencies

Anak Krakatau’s Continuous Eruptions End, but Authorities Urge Vigilance

From Republika · () Indonesian

Translated from Indonesian and summarized by DistantNews. Read the original for the full story.

At a glance

News Official statement Ongoing story
  • The continuous eruption lasted about 25 hours, from late Sept. 4 until early Sept. 6, according to Indonesia’s volcanology agency.
  • Anak Krakatau continues to produce Strombolian eruptions, with a dark ash column reaching up to 300 meters above the summit.
  • The volcano remains at Alert Level III, and people must stay outside a 3-kilometer radius, although the current activity has not triggered a tsunami.

Anak Krakatau’s continuous eruption ended after about 25 hours, but the volcano in the Sunda Strait remains active and authorities are warning people not to lower their guard.

The Center for Volcanology and Geological Hazard Mitigation said the episode began at 11:07 p.m. local time on Sept. 4 and ended at 12:04 a.m. on Sept. 6. The agency said the volcano has since returned to Strombolian activity, which it described as characteristic of Anak Krakatau.

The episode of continuous eruption that began on 4 September 2026 at 23:07 ended on 6 September 2026 at 00:04, after lasting about 25 hours.

· Siti Sumilah Rita SusilawatiThe head of Indonesia’s volcanology agency described the duration of the continuous eruption.

By 6 a.m. on Sept. 7, observers had recorded Strombolian eruptions producing a black column that rose as high as 300 meters above the summit. Instruments registered three eruption earthquakes, nine blast earthquakes, 93 low-frequency earthquakes and 98 hybrid or multiphase earthquakes, along with other volcanic activity.

The end of the continuous eruption and the return to the Strombolian pattern are temporarily interpreted as the end of one episode of continuous eruption.

· Siti Sumilah Rita SusilawatiShe explained how the agency interpreted the change in eruptive activity.

The agency said volcanic energy increased on Sept. 5 before declining again the following day. Deformation data showed no significant change indicating a rapid increase in pressure. Siti Sumilah Rita Susilawati, head of the agency, said the end of the continuous eruption and return to Strombolian activity were temporarily interpreted as the close of one eruptive episode.

Volcanic activity remains high, however, and another eruption in the near future remains possible. The main hazards could include incandescent rocks, heavy ashfall, hot clouds and lava flows if continuous activity resumes. Anak Krakatau remains at Alert Level III. Residents, tourists and people operating vessels may not enter within 3 kilometers of the activity center. Coastal communities in Banten and Lampung have been told to remain calm, as the current eruption is not causing a tsunami. The agency said it would continue intensive visual and instrumental monitoring and revise the status and recommendations if activity changes significantly.

The main potential hazards are incandescent rocks, heavy ashfall, hot clouds and lava flows if continuous eruption resumes.

· Siti Sumilah Rita SusilawatiShe listed the hazards that could accompany renewed continuous activity.
About this summary

Originally published by Republika in Indonesian. Translated, summarized, and contextualized automatically by DistantNews, with a note on how the source frames the story. Not individually reviewed before publishing. How this works.

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