www.Primo.com: Did You Know Early History of Lake Toba.

Who is not familiar with the lake Toba, was Lake Toba from the eruption of Mount Toba. Mount Toba supervolcano is classified, this is because Mount Toba has large pockets of magma that if a large caldera erupts once. Volcano kalderanya hundreds of meters, whereas the Supervolacano tens of kilometers.

Mount Toba is located under the bottom of Lake Toba in North Sumatra, which is when - the time the estimate could erupt. Mount Toba until today still have a child, even Sinabung erupted some time ago and Mount Sibayak, a subsidiary of Mount Toba.

Previous Mount Toba erupted three times :

The first eruption occurred about 800 thousand years ago. This results in a caldera eruption in the south of Lake Toba, covers an area of Prapat and Porsea.
The second eruption that has little real power, occurred 500 thousand years ago. This eruption formed a caldera in the north of Lake Toba. Precisely in the area between Silalahi with Haranggaol. Of the two eruptions, the eruption ketigalah most powerful.
The third eruption 74,000 years ago produced the caldera, and become current with Lake Toba Samosir Island in the middle.

The eruption of Mount Toba is a volcanic eruption of the most powerful ever known on this planet Earth. And nearly wiping out generations of mankind on the planet Earth. 73,000 years ago the eruption of the supervolcano in Indonesia, almost wiping out the entire human race, only a few survivors. Awesomeness Toba eruption is very popular and is a great 3 most devastating volcano eruption on the planet. And the sun reportedly also shut for 6 years.

This eruption can not be compared with anything that has been experienced on Earth since the time when humans could walk upright. Compared with the supervolcano Toba, even Krakatoa which caused tens of thousands of fatalities in 1883 is just a little burp. Whereas Krakatau have explosive power equivalent to 150 megatons of TNT. For comparison: the Hiroshima nuclear bomb explosion has only 0,015 megatons of explosive power, and verbally then power the destruction of 10,000 times weaker than Krakatoa. The eruption of Mount Toba nearly wiping out mankind 73.00 years ago.

Along with the huge tsunami waves, there is 2,800 cubic kilometers of ash were issued, which spread throughout the earth's atmosphere. Which may have reduced the human population to only about 5000 to 10000 humans only.

Actually contemporary man from several thousand people who survived the eruption of a super volcano Toba 73,000 years ago

Therefore volcano in Indonesia is responsible for almost extinction of the human race. And from 60 to 70 volcanoes in the area can ditemuai (Indonesia) now.

Some of them become active again within a few months or a few weeks after the earthquake on the seafloor in December 2004.

Mount Toba eruption, which led to the emergence of Lake Toba, which is the largest lake in Indonesia, even in Southeast Asia and has beautiful scenery. In the middle of this lake there is an island called the island of Samosir, which is the origin of Batak tribe is located.

The formation of Lake Toba awesomeness In the Past.

Lake named Toba, extend the beautiful and picturesque in the region of North Sumatra. But behind it, in the past, the Most Powerful damaged power hidden inside. Approximately less than 74,000 years ago, Mount Toba erupted was superb and almost completed mankind.

Awesomeness gigantic volcanic eruptions (Supervolcano) Toba, sourced from the turmoil beneath the earth hyperactive. Indo-Australian Plate ocean sediment layers containing subducting beneath the Eurasian continental plate, the seat of Sumatra island, at a speed of seven centimeters per year.

Friction two plates at a depth of about 150 kilometers below the earth it creates heat that melts the rocks, then climb to the top as magma. The more sediment to get into, the more its magma source.

Toba magma pockets are many such, is supplied by a number of continental shelf sediments melt hyperactive. Collaboration three researchers from the German Center for Geosciences (GFZ) by Danny Hilman of the Indonesian Institute of Sciences (LIPI) and the governor of Meteorology, Climatology and Geophysics (BMKG) in 2010 concluded, that under the Toba caldera there are two magma chamber separately.

Magma chamber volume is estimated to have at least 34,000 cubic kilometers of magma that confirms the amount ever issued by this mountain before.

Not only is affected by the volcanic activity of the magma chamber, Toba caldera was also strongly influenced by tectonic activity in on him, so the geologists call a volcano-tectonic.

The collision of tectonic plates very strong from the Indo-Australian plate, has triggered the formation of large shear fault known as the Great Sumatran Fault Zone (Sumatra Fault Zone / SFZ). This fault extends up to 1,700 kilometers from the Gulf of Lampung, to Aceh. Almost all volcanoes in Sumatra stand on this gigantic fault.

Uniquely, Toba caldera are not exactly on top of this fault. He deviated a few kilometers to the northeast fault Sumatra. "Between the River and River Barumun Wampu, Barisan Mountains (which stand on fault) suddenly widened and occurs under the form of appointment of the plateau; length of 275 km and 150 km wide called Batak Tumor, "said Van Bemmelen, Dutch geologist who in 1939 first suggested that Toba volcano is.

Appointment Batak These tumors, called Bemmelen, be the initial phase of the formation of Mount Toba. When inflation occurs, some magma out through the cracks beginning to form the body of the mountain. Traces the beginning of the body of the mountain is still visible around Haranggaol, Tongging, and Silalahi. While most of the others had been destroyed during the latest eruption of Toba about 74,000 years ago.

Lake Toba is clearly influenced by the style of this fault. Lake Toba elongated shape, not round as usual caldera, showed he was influenced by the style of shear fault coincides in this region.

The longest side of the lake, which reaches 90 km, parallel to the Sumatra Fault Zone, which is one of the world's most active fault other than the San Andreas Fault in America. Volcanic activity in Sumatra, including Toba, controlled by this fault. Thank you for reading this article.
Written and posted by Bambang Sunarno. sunarnobambang86@gmail.com
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DatePublished: 27 April 2015 at 13:53