Lake Toba. Landsat 8 satellite image of Lake Toba volcano,Sumatra,Indonesia. This lake is 100 kilometres long and 30 kilometres wide. It was formed when the land collapsed following a volcanic eruption. The island at centre,Samosir Island,is a resurgent dome resulting from the refilling of the underground magma chamber. An eruption of Toba 74,000 years ago is thought to have been the largest volcanic eruption ever,causing a volcanic winter that lowered global temperatures for several years,and wiped out a large proportion of the human population. Image obtained by Landsat 8's Operational Land Imager (OLI),in May 2013 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / US Geological Survey |
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