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, Krakatau for its global effects in 1883, Lake Toba for its supervolcanic eruption estimated to have occurred 74,000 Before Present which was responsible for six years of volcanic winter, and Mount Tambora for the most violent eruption in recorded history in 1815.
Mount Klabat is the highest volcano on Sulawesi island, located in the east of Manado city, North Sulawesi, Indonesia. A 170 by 250 meter wide, shallow crater lake is found at the summit. There are no confirmed historical eruptions of the volcano. A report of an eruption taking place in 1683 is thought to have been produced by the Mount Tongkoko volcano instead.