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Volcanic activity at Anak Krakatau creates new land formations

Fresh eruptions from Indonesia's notorious Anak Krakatau volcano have resulted in the emergence of new islands near the active crater. The geological development marks another chapter in the volatile history of the Sunda Strait volcano.

LSN Indonesia · 2 October 2026

Anak Krakatau, the young volcano that has repeatedly reshaped Indonesia's landscape, has once again demonstrated its formidable geological power through recent eruptive activity that has generated previously submerged terrain. The new islands represent a continuation of the volcano's pattern of dramatic growth and transformation, a process that has fascinated scientists and observers since the volcano's initial emergence in 1927.

The appearance of new land masses follows a series of volcanic events at the site, located between Java and Sumatra in the Sunda Strait. Such geological phenomena are characteristic of Anak Krakatau's ongoing construction, as successive eruptions deposit lava and volcanic material that gradually builds upward from the seafloor.

The volcano remains under close monitoring by Indonesia's Centre for Volcanology and Geological Hazard Mitigation, which maintains surveillance of seismic activity and eruption patterns. Authorities continue to assess potential impacts on shipping lanes and nearby communities within the strait.

Anywhere between a handful to dozens of islands have come and gone throughout Anak Krakatau's recorded history, disappearing during dormant periods or being submerged by coastal erosion. The latest developments underscore the dynamic geological processes actively shaping Indonesia's complex archipelagic geography.