The Origin of Toba Lake

MYCULTURED

It is estimated that Toba Lake was formed during a volcanic eruption about 73.000-75.000 years ago and which was the most recent super volcano eruption. Bill Rose and Craig Chesner from Michigan Technological University estimated that volcanic materials that were spewed out the mountain totaling 2800km3, with 800km3 ignimbrites rock and 2000km3 volcanic ash that is estimated was blown (wind) to the west for 2 weeks. This incident caused mass death (destruction) and to several species also causes extinction. According to some DNA proof, this eruption also shrinks the humankind population to around thousands back then.

After this eruption, a caldera was formed that was filled by water afterwards and now known as Toba Lake. The pressure from the dormant magma, which has not yet erupted, caused Samosir Island to emerge. The region that now known as Samosir Island originally was a peninsula that attached to the Sumatran mainland. In this peninsula the Netherlands built the water canal 10 m width.

For the first time visitors, going through Medan-Parapat route seeing a lake as big as that made Samosir appear like an amazing grand island. However, the island perspective will certainly faded with the increase in Toba plateau visitor, Nias and the other places in the south, through Medan-Berastagi route. Samosir occupied a central geographical position in the Toba plateau region. With the declaration of the Toba Samosir Regency (the inhabitants 302.000 lives, the area with wide of 3.440 km including the lake) it finally ascend from only a shadow into a Regency. Moreover, the width of Samosir Island exceed Singapore (647 km), in fact Toba Lake almost twice bigger than Singapore. The Samosir image in tourism books as the backpackers location must be changed because this historic place must restore the greatness of its past.

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