The paper provides new data related to the accessory minerals found in ashes from phreatic eruption of Klyuchevskoy volcano in 2008—2009. We characterized form of extraction, composition and specific features of garnet, corundum, deltalumine, muassonite, sulfide thallium, native metal and carbon phases including micro-diamond, and also likely abiogenic condensed organic compound. A feature of the Koryak diamonds is a very small size and a cubic habit, which may indicate their crystallization from the gas phase under conditions of significant super saturation along the carbon. The detection of various particles and filaments of condensed organic compounds in the form and color in the ash of the Koryak volcano confirms the previous conclusion about systematic inorganic synthesis of highly organized prebiological forms of organic matter in modern volcanoes.

Based on a detailed seismological observations from 1962 through 1994, the deep structure, focal layer geometry, magmatic feeding system of the Shiveluch volcano are investigated. Beneath the Shiveluch volcano, a focal layer deepens at an angle of 70 at depths of 100—200 km. Based on the established interrelation between the seismicity at depths of 105—120 km and a phase of extrusive volcano eruption in 1980 through 1994, a conclusion has been made that melting of primary magmas, periodically feeding the crustal chamber, occurs at depths at least 100 km. Increase of extrusive-explosive activity of the volcano is preceded and accompanied by the increasing number and energy of volcanic earthquakes both beneath the dome and in the zones of crustal faults of northwestern trend. A description is given of the methods used in the successful short-term prediction of the eruption in April 1993 which has been the most powerful since 1964. A mean-term prediction of possible increase of the volcano activity in April — July of 1995 is made.

Glacial balance observations and the information of meteorological network were used to reconstruct a long-term mass balance of Kozelsky and Grechishkin glaciers (Avachinsky volcanic group and mountains Ostraya and Khuvkhoytun). The mean annual balance of both glaciers is negative and equals 30 and 38 g/cra , respectively, for the last 40 years. From the beginning of the sixties favourable climatic conditions for glacial development of Kamchatka were observed, which caused the transgression of Kozelsky glacier in 1972-76 and the deceleration of degradation rate of Grechishkin glacier.
Besides that the regime of the crater glaciers of Mutnovsky volcano was examined (analysed). The accumulation of solid precipitation reaches here 3000 mm per year. The measured mass balance of North-eastern and Southwestern glaciers in 1980 were 29 and 23 g/cm2 respectively. Presently, this volcano is active and has a positively influence on the crater glacier regime. The area of crater glaciation has increased by 0.4 km2 or 17% since the major eruption in 1945.