The monograph is devoted to the spatio-temporal activation of Holocene volcanism within the Miocene-Quaternary volcanic zone of the Sredinny Range of Kamchatka. The pattern of volcanic activation, grouping elements and periodic pulses of endogenous activity, as well as their chronological relationship with episodes of endogenous activity increasing of the North Pacific. The characteristics of individual volcanic centers and the largest eruptions are provided. Age determinations of eruptions are based on detailed tephrochronological research and extensive radiocarbon dating.
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The paper presents data on specified northern boundary of the Holocene volcanic activity in Kamchatka. This boundary is located 80 km to the north for the frontal volcanic zone and 180 km to the northwest from Sheveluch Volcano for the zone of the Sredinny Range. For the first time numerous evidence for the Holocene volcanic activity within the Kamchatkan zones with no deep seismicity and located to the north from the Aleutian transform fault were detected, studied and dated using geologic methods and isotope geochemistry. Radiocarbon age for the eruptions was estimated.

Numerous Holocene volcanic centres (5 stratovolcanoes, including 4 active and potentially dangerous, and 12 monogenetic centres) are discovered within Sredinny Range of Kamchatka. Their exact ages are determined. Spatial and temporal characteristics, as well as composition of Holocene volcanic rocks witness against direct connection of magma genesis with contemporary Pacific plate subduction. Sub-meridional chronological trends and elements of grouping, identified for Holocene volcanic activity of Sredinny Range of Kamchatka, may indicate seismo-geodynamical nature of young volcanic activity and associated with it advection in the extinct island arc system.

Изучены два вулканических центра в пределах Срединного хребта Камчатки - Южный и Северный Черттук. Рассмотрены морфология и строение шлаковых конусов и лавовых потоков, особенности состава их пород. Подсчитаны объемы изверженного материала для обоих центров (>2 км3 каждый). Впервые получены С-датировки (-3550 л.н.) для Южного Черпука и приведены данные о предполагаемом возрасте (-1740 г. н.э.) Северного Черпука. Обсуждается проблема генезиса указанных вулканических центров.

Tephrochronological and radiocarbon investigations of soil-pyroclastic depositsalong the line Shiveluch Volcano - Chernyi Yar - Bering I. have detected and identified the ashes oflargest (for the past 6500 years) eruptions on Shiveluch Volcano in the southeastern sector of the ashabundance area, as well as the ashes of Bezymyannyi, Ksudach, Klyuchevskoi, Avacha and Khangarvolcanoes. A detailed radiocarbon dating of peat deposits in Chernyi Yar has not only improved the agedeterminations of the eruptions themselves but also helped in the determination of ash fall rate for thelower Kamchatka R. valley, namely, once in 191 years. Apart from the 1964 tephra, we suggest for useas regional geochronological markers the ash horizons of Shiveluch Volcano having the followingrounded radiocarbon dates: 265 (SH1), 965 (SH2), 1450, 2800, 3600 (SP), 4105 (SHDV), 4800, as well asthe ashes from Ksudach 1806 (KS1) and Avacha 5489 (AV2) volcanoes.