Is Krakatoa Active, Dormant or Extinct?

The three volcanoes of Krakatoa Island – Perboewatan, Danan and Rakata – are thought to be extinct following the cataclysmic 1883 eruption. The first two volcanoes, Perboewatan and Danan, were completely destroyed in the eruption, along with two-thirds of Krakatoa Island.

The northern half of the surviving volcano, Rakata, slid into the ocean, sealing the magma conduit. After 44 years of no activity, a new volcano began rising out of the collapsed caldera in 1927. This new peak, in the area between where Perboewatan and Danan were, was named Anak Krakatoa, which means "child of Krakatoa." Since 1950, it has grown at a rate of 5 inches per week and erupts infrequently.