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Indonesian volcano creates twin islands following intense September eruption

Anak Krakatau has spawned two new landmasses in the waters surrounding it following a 25-hour volcanic eruption in early September. The formations emerged on opposite sides of the volcano, marking a dramatic reshaping of Indonesia's volatile volcanic landscape.

LSN India · 2 October 2026

Indonesian volcano creates twin islands following intense September eruption

The two newly formed islands have appeared hundreds of meters off Anak Krakatau, with one emerging to the northwest and another to the southeast of the active volcano, located in the Sunda Strait between Java and Sumatra. The discovery followed an intense eruptive episode that lasted approximately 25 hours in the opening days of September.

Anak Krakatau, whose name translates to "Child of Krakatau," is one of Indonesia's most closely monitored volcanic sites. The volcano has demonstrated ongoing activity in recent years, with previous eruptions reshaping its physical geography and triggering warnings to nearby communities.

The emergence of the new islands underscores the dynamic geological processes at work in the region. Indonesia straddles the Pacific Ring of Fire, making it one of the world's most seismically and volcanically active areas, with dozens of active volcanoes scattered across its vast archipelago.

Authorities have not immediately issued new restrictions on maritime traffic or coastal settlements in response to the new formations. Monitoring of Anak Krakatau remains ongoing as scientists assess the stability of the newly created landmasses and the volcano's continued activity patterns.