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Lake Toba is a volcanic lake at 100km x 30km in North Sumatra, Sumatra, Indonesia. In the center there is a volcanic island called Samosir Island.
Lake Toba has long been an important tourist destination in addition to Bukit Lawang, North Sumatra and Nias, attracting domestic and foreign tourists.
Lake Toba is estimated that when the explosion occurred around 73000-75000 years ago and is the eruption Supervolcano (super volcano), the most recent. Bill Rose and Craig Chesner from Michigan Technological University estimate that volcanic materials of the mountain spit out as much 2800km3, with 800km3 2000km3 rocks and volcanic ash overlies the west wind is expected for two weeks.
This incident caused mass death and also participated in several species extinction. According to some DNA evidence, this eruption also shrink the number of people until about thousands only.
After the eruption, the caldera formed which was then filled with water and became what is now known as Lake Toba. Pressure upward by magma that has not come out cause the appearance of Samosir Island.
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