Mount Bromo (Indonesian: Gunung Bromo), is an active volcano and part of the Tengger Caldera, in East Java, Indonesia. At 2,329 meters it is not the highest peak of the massif, but it is the most well known.
The 16-km-wide Tengger caldera is located at the northern end of a volcanic massif extending from Semeru volcano. The massive Tengger volcanic complex dates back to about 820,000 years ago and consists of five overlapping stratovolcanoes, each truncated by a caldera. Lava domes, pyroclastic cones, and a maar occupy the flanks of the massif. The Ngadisari caldera at the NE end of the complex formed about 150,000 years ago and is now drained through the Sapikerep valley. The most recent of the Tengger calderas is the 9 x 10 km wide Sandsea caldera at the SW end of the complex, which formed incrementally during the late Pleistocene and early Holocene. An overlapping cluster of post-caldera cones was constructed on the floor of the Sandsea caldera within the past several thousand years. The youngest of these is Bromo, one of Java's most active and most frequently visited volcanoes. The massif area is one of the most popular tourist attractions in East Java, Indonesia.
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- Which year was the last eruption of the Bromo vulcano.
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