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Detailed explanation-1: -Anak Krakatoa (Indonesian: Anak Krakatau) is a volcanic island in Indonesia. On 29 December 1927, Anak Krakatoa first emerged from the caldera formed in 1883 by the explosive volcanic eruption that destroyed the island of Krakatoa.

Detailed explanation-2: -Krakatau volcano in the Sunda Strait between Java and Sumatra, Indonesia, had a major caldera collapse around 535 CE; this event formed a 7-km-wide caldera ringed by the three islands of Verlaten, Lang, and Rakata. A new island grew that was then destroyed in the 1883 caldera-forming eruption.

Detailed explanation-3: -Krakatoa, Indonesian Krakatau, volcano on Rakata Island in the Sunda Strait between Java and Sumatra, Indonesia. Its explosive eruption in 1883 was one of the most catastrophic in history.

Detailed explanation-4: -Krakatau is directly above the subduction zone where the Eurasian Plate and Indo-Australian Plate meet creating a strato-volcano chain. The plate boundaries make a sharp change of direction, possibility resulting in an unusually weak crust in the region. Mainly made up of strato-volcanoes.

Detailed explanation-5: -Indonesia’s Anak Krakatau erupts nine times, sends 4, 921 feet of ash into the sky. The deadly volcano is active once more. The infamous Anak Krakatau, also known as Krakatoa, in Indonesia has erupted once again, sending a 1, 500 meter (4, 921 feet) cloud of ash into the sky.