The detectives hunting for underwater volcanoes
uring the summer of 1883, a caldera in the Sunda Strait, located between the islands of Java and Sumatra, became increasingly turbulent, releasing huge plumes of ash and steam into the sky. Then, on 26 August, an underwater volcano ejected approximately 25 km3 (six cubic miles) of debris, hurtling pumice ash and boiling lava flows across nearby settlements. The eruption killed tens of thousands of people. Krakatoa remains one of the most deadly underwater eruptions in history.