Lake Toba

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

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 around 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 materials vulkanik a mountain dimuntahkan of 2800 km ³, with 800 km ³ ignimbrit rock and 2,000 km ³ of ash vulkanik estimated tertiup wind to the west for 2 sunday. Vulkanik be blown dust that the wind has spread to half the earth, from China to South Africa. Letusannya going for 1 sunday and throw debunya 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 menyusutkan number of people to 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 memperdebatkannya.



After the eruption, 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.