Toba lake

Lake Toba is a lake formed by volcanic volcanic activity including Super Vulcan, which is Mount Toba located in North Sumatra Province, Indonesia. The eruption of Mount Toba is estimated to occur about 73,000 to 75,000 years ago.

Large volcanic eruption of Mount Toba
Large Volcanic Eruption of Mount Toba, Source: argakencana.blogspot.co.id
Because of the huge eruption of Mount Toba some foreign researchers conducted research on the causes that resulted in Lake Toba formed. It is estimated that the eruption of Mount Toba is one of the most powerful eruptions that ever existed because the total material released reaches 2,800 km3 - 2,000 km3 of Ignimbrit that flows over the ground, and about 800 km3 which falls as mainly ash to the west. The pyroclastic flow from the eruption destroys an area of ​​20,000 km2, with ash deposits as thick as 600 m with the main crater. This led to the formation of a large caldera filled with water now known as Lake Toba and upward pressure by magma that has not yet come out causing the formation of an island in the middle of the lake known as Samosir Island.
This lake has a size of 100 kilometers long and 30 kilometers wide so that this lake is the largest lake in Indonesia and Southeast Asia, because this is the lake is already famous to foreign countries. In addition to this lake is famous for its beauty so that until now many tourists who visit Lake Toba and Samosir Island.