The Kurile Lake caldera forming eruption , also known as " KO " , occurred in 6460-6414 BC . It is the largest known Holocene eruption in Kamchatka . Tephra from this eruption has been found in southern Kamchatka and also Magadan in Asia . The total volume of the Kurile Lake caldera forming eruption is about , corresponding to a volcanic explosivity index of 7 and comparable to the 1815 eruption of Tambora . Other volcanoes with such large eruptions during the Holocene include Baitoushan , Crater Lake and Kikai . The volume of the Kurile Lake eruption may have exceeded that of the Tambora eruption
1815 eruption of Tambora
1815 eruption of Mount Tambora
Kurile Lake