Lake Toba

Lake Toba is a lake with vulkanik length 100 kilometers and 30 kilometers wide, located in North Sumatra, Indonesia. In the middle of this lake there is an island called Vulcanic Samosir Island.

Lake Toba long since become a key tourist destination in North Sumatra, in addition to Bukit Lawang and Nias, attract domestic and foreign tourists.

History

Estimated to Lake Toba explosion occurred at about 73000-75000 years ago and is bursting supervolcano (super volcano), which is new. Bill Rose and Craig Chesner from Michigan Technological University estimate that the material vulkanik a mountain dimuntahkan of 2800 km ³, with 800 km ³ ignimbrit rock and 2000 km ³ of ash vulkanik estimated involved wind to the west for 2 weeks. Vulkanik be blown dust that the wind has spread to half the earth, from China to South Africa. The eruption going for 1 week and throw the dust reached 10 km above sea level.

This incident caused the death of the bulk and in some species also followed by extinction. According to some DNA evidence, this eruption also shrink until the number of people around 60% of the earth's human population at that time, namely around 60 million people. The explosion also caused a time of ice, although experts still debated

After the explosion, the kaldera form which is then filled by water and has become now known as Lake Toba. Pressure up by magma that has not come out cause the emergence of Samosir Island.