Volcanoes in Indonesia are part of the Pacific Ring of Fire. The geography of Indonesia is dominated by volcanoes that are formed due to subduction zones between the Eurasian Plate and the Indo-Australian Plate. Some of the volcanoes are notable for their eruptions, for instance, Krakatoa for its global effects in 1883, Lake Toba for its supervolcanic eruption estimated to have occurred 74,000 years Before Present which was responsible for six years of volcanic winter, and Mount Tambora for the most violent eruption in recorded history in 1815. The most active volcanoes are Kelud and Merapi on Java island which have been responsible for thousands of deaths in the region. Since AD 1000, Kelud has erupted more than 30 times, of which the largest eruption was at scale 5 on the Volcanic Explosivity Index (VEI), while Merapi has erupted more than 80 times. The International Association of Volcanology and Chemistry of the Earth's Interior has named Merapi as a Decade Volcano since 1995 because of its high volcanic activity. (Full list...)