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Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Braitseva O, Ponomareva V, Melekestsev I, Sulerzhitsky L, Pevzner M, 2002-. Holocene Kamchatka volcanoes. http://www.kscnet.ru/ivs/volcanoes/holocene/main/main.htm

Erlich E N, Melekestsev I V, Tarakanovsky A A, Zubin M I, 1972. Quaternary calderas of Kamchatka. {Bull Volc}, 36: 222-237

Masurenkov Y P (ed), 1980. {Volcanic Center: Structure, Dynamics and Products}. Moscow: Nauka Pub, 299 p (in Russian)

Sviatlovsky A E, 1959. {Atlas of Volcanoes of the Soviet Union}. Moscow: Akad Nauk SSSR, 170 p (in Russian with English summary)

Vlasov G M, 1967. Kamchatka, Kuril, and Komandorskiye Islands: geological description. {In}: {Geol of the USSR}, Moscow, 31: 1-827

Tolmachev Dol (Tomachev Plateau) is broad volcanic highland NE of Opala volcano that is dotted with numerous late-Pleistocene and Holocene cinder cones and associated lava flows. The cones and lava fields cover a broad area on both sides of scenic Lake Tolmachev, which lies in large depression halfway between Opala and Gorely volcanoes. The 1415-m-high Tolmachev stratovolcano of Pleistocene age lies on the SE side of the lake. A major explosive eruption took place about 4600 years ago from Chasa crater in the northern part of the plateau, during which about 1 cu km of rhyolitic tephra was ejected. The latest dated eruption at Tolmachev Dol occurred from a cinder cone in the NW part of the plateau about 1600-1700 years ago.