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Fresh islets emerge in Anak Krakatau's caldera following volcanic activity

Satellite imagery has revealed the formation of new islands within the water-filled crater of Indonesia's active Anak Krakatau volcano. The emergence of the landmasses follows recent eruptive activity at the renowned volcanic cone.

LSN Malaysia · 2 October 2026

Fresh islets emerge in Anak Krakatau's caldera following volcanic activity

New islands have appeared within the caldera of Anak Krakatau, Indonesia's renowned volcanic cone located in the Sunda Strait between Java and Sumatra. The formations were detected through satellite imagery analysis of the crater's interior, which is filled with seawater.

Anák Krakatau, meaning "Child of Krakatau," has a history of dramatic geological activity. The volcano emerged from the caldera of the original Krakatau, which underwent a catastrophic eruption in 1883 that claimed tens of thousands of lives across the region.

The appearance of new land masses within the caldera indicates ongoing volcanic and geomorphological processes beneath the surface. Such formations are not uncommon at active volcanic sites where lava and pyroclastic material accumulate over time. The discovery underscores the dynamic nature of Indonesia's volcanic landscape, which sits along the Pacific Ring of Fire.

Geological monitoring of the volcano continues as authorities track any changes that could impact maritime traffic or coastal communities in the surrounding region. Anak Krakatau remains one of Indonesia's most closely observed volcanic systems due to its location and historical significance.