The island draws attention by scientists and researchers from both within and outside the country , as the island is related with the phenomenal eruption of Mount Tambora which shook the world on 15 April 1815 . The eruption of Mount Tambora rocked several parts of the world , spewing dust and polluting the Earth ’s atmosphere for many years , even tearing the thin ozone layer . Although estimates vary , the death toll was at least 71,000 people , of which 11,000 – 12,000 were killed directly by the eruption . Its effects also resulted in climate change which led to eight weeks of nonstop rain in the UK , and has been cited as a reason for the severity of the 1816 – 19 typhus epidemic in southeast Europe and the eastern Mediterranean that killed about 65,000 people . There is a lake in the middle of the island which has an area of 335 hectares and 86 meter deep . Research by two European scientists named Stephan Kempe and Josef Kazmierczak during 1984 , 1989 and 1996 found the water of Satonda Lake as salty with alkaline levels much higher than regular sea water . They jointly concluded that Satonda basin was formed of craters aged more than ten thousand years
eruption of Mount Tambora
1815 eruption of Mount Tambora
Satonda Island