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Krakatoa (/ ˌ k r ɑː k ə ˈ t oʊ ə, ˌ k r æ k-/), also transcribed Krakatau (/-ˈ t aʊ /), is a caldera [1] in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung.
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Anak Krakatau [notes 1] is a volcanic island in Indonesia. On 29 December 1927, Anak Krakatau first emerged from the caldera formed in 1883 by the explosive volcanic eruption that destroyed the island of Krakatoa .
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In the months leading up to the 2018 tsunami, Anak Krakatau had seen increased activity. Starting in June 2018, Anak Krakatau saw an increase of volcanic activity with a Strombolian eruption, producing lava flows and ash plumes as high as 5 km. One day prior to the collapse, on 21 December, an eruption was observed which lasted more than two ...
The Loudon and the W.H. Besse, at ~65 km north-northeast and ~80 km east-northeast of Krakatau respectively, were hit by strong winds and tephra. They were farther away than the scorched victims of the hot flows in Sumatra, so the ships and crew survived. [ 13 ]
Rakata is a volcanic cone with its northern face being a vertical cliff, exposing much of its eruptive history.More than 25 extrusion dikes have been counted; the largest at the center runs from sea level to 320 meters above and terminates in a large (about 6 meters in diameter), convex form.
It is about eight times stronger than that of Krakatau. [70] In the northern hemisphere it is only exceeded by the signal of the destructive 1783/1784 Laki eruption. [98] The ice core sulfate spikes have been used as a time marker in chronostratigraphic studies. [100]