The Sunda Strait separates the islands of Sumatra and Java with the volcanic island Krakatoa lying between them. Krakatau erupted violently in 1883, destroying two-thirds of the island and leaving a large caldera under the sea. This cataclysmic explosion was heard as far away as the island of Rodrigues near Mauritius (approx. away). A new parasitic cone, called Anak Krakatau (or the child of Krakatau), rose from the sea at the centre of the caldera in 1930. The other Krakatau islets from the 1883 eruptions are known as Sertung, Panjang and Rakata.