No latest activity reported for Alney-Chashakondzha.

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.

Erlich E N, 1986. Geology of the calderas of Kamchatka and Kurile Islands with comparison to calderas of Japan and the Aleutians, Alaska. {U S Geol Surv Open-File Rpt}, 86-291: 1-300

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. {IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior}.

Kozhemyaka N N, 1996. Long-lived volcanic centers of Kamchatka: types of cones, growth time spans, volumes of erupted material, productivities, rock proportions, and tectonic settings. {Volc Seism}, 17: 621-636 (English translation)

Ogorodov N V, Kozhemyaka N N, Vazheevskaya A A, Ogorodov A S, 1972. {Volcanoes and the Quaternary Volcanism of the Sredinny Ridge in Kamchatka}. Moscow: Nauka Pub, 190 p (in Russian)

Pevzner M M, 2004b. New data on Holocene monogenetic volcanism of the northern Kamchatka: ages and space distribution. IV Internatl Biennial Workshop on Subduction Processes, Petropavlovsk-Kamchatsky, August 21-27, 2004, Abs

Pevzner M M, 2006. Holocene volcanism of Northern Kamchtaka: the spatiotemporal aspect. {Trans (Doklady) USSR Acad Sci Earth Sci}, 409: 648-651

Ponomareva V, Melekestsev I, Braitseva O, Churikova T, Pevzner M, Sulerzhitsky L, 2007b. Late Pleistocene-Holocene volcanism on the Kamchatka Peninsula, northwest Pacific region. {In}: Eichelberger J, Gordeev E, Izbekov P, Kasahara M, Lees J (eds), Volcanism and Subduction: the Kamchatka Region, {Amer Geophys Union, Geophys Monogr}, 172: 165-198

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

The glacier-capped Alney-Chashakondzha complex, one of the largest volcanoes of the Sredinny Range, consists of two large mostly Pleistocene andesitic stratovolcanoes constructed on a large Pliocene shield volcano. Both 2598-m-high Alney on the north and 2526-m-high Chashakondzha on the south are capped with andesitic lava domes. Three rhyodacitic-to-rhyolitic lava domes and associated lava flows were emplaced along ring faults enclosing a 15 x 20 km area. Two cinder cones on the east flanks of Alney and Chashakondzha volcanoes erupted about 2600 years ago and produced lava flows, one of which traveled as far as 9 km down the eastern flanks of the complex. Alney is one of the few large stratovolcanoes in the Sredinny Range known to have been active throughout the Holocene, with more than 30 documented pyroclastic deposits. The last intense eruption took place about 350 years ago.