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Later, at least two more cones (Perboewatan and Danan) formed and eventually joined with Rakata, forming the main island of Krakatoa. [15] At the time of the 1883 eruption, the Krakatoa group comprised Lang, Verlaten, and Krakatoa itself, an island 9 km (5.6 mi) long by 5 km (3.1 mi) wide.
The fate of northern Krakatoa has been the subject of some dispute among geologists. It was initially proposed that the island had been blown apart by the force of the eruption. Most of the material deposited by the volcano is magmatic in origin, and the caldera formed by the eruption is not extensively filled with deposits from the 1883 eruption.
The 2009 episode "Krakatoa" of History's geology-based documentary series How the Earth Was Made also chronicles the geologic history of Krakatoa. [14] In a 1991 episode of the TV show Seinfeld, Jerry (in 1985) is tricked by Kramer into donating money to the Krakatoa relief fund, even though it erupted 102 years earlier.
Rakata (a.k.a. Greater Krakatoa) – Standing 813 metres (2,667 feet) tall, it was the largest and southern-most of three volcanoes that formed the now destroyed island of "Krakatoa" (the others being Danan and Perboewatan), and the only one not obliterated in the eruption of 1883. However, Rakata did lose its northern half in that eruption ...
After the cataclysmic eruption of Krakatoa in 1883, Krakatoa Island lost approximately two-thirds of its mass on the northwest side, obliterating the peaks of Perboewatan and Danan, and leaving only the southern half of the island, including the Rakata volcano, as the last remnant of the original island. The lost area became a shallow sea.
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 was the lowest (121 m) and northernmost of the cones. Perboewatan was completely destroyed during the 1883 eruption; the caldera is approximately 250 metres (820 ft) deep at its former location. [1] Photographed on May 27, 1883 by visitors to the island, Perboewatan is the only cone on Krakatoa of which quality pre-1883 photographs exist.
Danan was almost entirely destroyed in the 1883 eruption of Krakatoa; only a rocky islet named Bootsmansrots remains of it. Not much information can be found about Danan; the interior of Krakatoa was little explored or surveyed. There were several peaks, and Verbeek surmised that it formed a "ring-shaped crater wall".