NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Mount Tambora. View from the International Space Station (ISS) of Mount Tambora volcano (upper left), on Sumbawa Island, Indonesia. The volcano's summit caldera, an area of collapsed land resulting from a volcanic eruption, measures 6 kilometres across and is 800 metres deep. The caldera was formed in 1815 after a huge explosion that ejected massive amounts of ash and sulphur dioxide into the atmosphere. Global cooling caused by the eruption led to 1816 being called 'the year without a summer'. Image obtained during Expedition 28 to the ISS, at 01:38 UTC on 6 August 2011.
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