Cool Toba Travel Guide PicturesLake Toba is a large lake, 100 km long and 30 km wide, in the middle of the northern part of the Indonesian island of Sumatra, Indonesia. When you see it you will probably be amazed of its natural beauty and lovely landscapes, but do not forget how it was formed in the past. Later researchers found rhyolite ash similar to that in the ignimbrite around Toba.
The Toba eruption occurred at what is now Lake Toba about 75 000 years ago. It had an estimated Volcanic Explosivity Index of 8 (which is known as mega-colossal), making it possibly the largest volcanic eruption within the last two million years. According to the researches made by Bill Rose and Craig Chesner of Michigan Technological University the total amount of erupted material was about 2800 cubic km (670 cubic miles) around 2000 cubic kilometres of ignimbrite that flowed over the ground and around 800 cubic kilometres that fell as ash, with the wind blowing most of it to the west.
The Toba eruption occurred at what is now Lake Toba about 75 000 years ago. It had an estimated Volcanic Explosivity Index of 8 (which is known as mega-colossal), making it possibly the largest volcanic eruption within the last two million years. According to the researches made by Bill Rose and Craig Chesner of Michigan Technological University the total amount of erupted material was about 2800 cubic km (670 cubic miles) around 2000 cubic kilometres of ignimbrite that flowed over the ground and around 800 cubic kilometres that fell as ash, with the wind blowing most of it to the west.
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