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Kelud Volcano, Indonesia
The most active volcano in East Java, Kelud is known for being extremely violent, with frequent explosions that have killed thousands of people. The worst of these eruptions took place in 1914, which led to the draining of its crater lake, with the resulting mudflows killing 5,000 people. Another major explosion took place in 2014, with a huge column of ash drifting over the Indian Ocean.
