The rim of the Kurile Lake caldera is best expressed at Ilinsky volcano and south and northwest thereof. Close to the lake, two Pleistocene caldera rims can be found and there may be more. The volcanoes Diky Greben, Ilinsky, Kambalny, Kosheleva and Zheltovsky surround Kurile Lake. Diky Greben formed after the eruption of Kurile Lake.