Krakatau volcano is located in the Sunda Strait between the islands of Java and Sumatra. In 1883, it erupted catastrophically, killing over 36,000 people due primarily to massive tsunamis. The eruption destroyed most of the pre-1883 volcanic edifice and reshaped the island. Krakatau appears to cycle through different eruptive phases over time, from basaltic to andesitic to dacitic, with each cycle culminating in a massive dacitic eruption.