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Debris avalanche of the 1956 Bezymianny eruption (1988)
Белоусов А.Б., Богоявленская Г.Е. Debris avalanche of the 1956 Bezymianny eruption // Kagoshima International Conference on Volcanoes: Proceedings of the International Conference on Volcanoes, Japan, Kagoshima, 19-23 July 1988. Kagoshima: Kagoshima Prefectural Government. 1988. P. 460-462.
Decade-long study of degassing at Kudriavy volcano, Iturup, Kurile Islands (1990–1999): Gas temperature and composition variations, and occurrence of 1999 phreatic eruption (2002)
Korzhinsky Mikhail A., Botcharnikov Roman E., Tkachenko Sergey I., Steinberg Genrikh S. Decade-long study of degassing at Kudriavy volcano, Iturup, Kurile Islands (1990–1999): Gas temperature and composition variations, and occurrence of 1999 phreatic eruption // Earth, Planets and Space. 2002. Vol. 54. № 3. P. 337-347. doi:10.1186/BF03353032.    Annotation
A high-temperature (up to 940°C) fumarolic activity at Kudriavy volcano had been studied during 1990–1999. The maximum gas temperatures of the fumaroles were measured in 1992 as 940°C, then gradually decreased with time and reached to 907°C in 1999. Gas composition of the high-temperature fumarole became enriched in H2O and depleted in other gas components, in particular in CO2. Hydrogen isotopic compositions of the high-temperature fumarolic gases were gradually depleted in deuterium. The gradual and continuous decrease in temperature and changes in gas composition observed during the last 10-year suggest that a magmatic melt have been degassing in a relatively steady-state manner from a single magma chamber. The detail investigations in 1998 and 1999 revealed short-term changes in gas composition characterized by sporadic increases in H2, CO2, and Stotal after intense precipitations. Small-scale eruptions occurred on October 7, 1999 at the summit. The ratios of major gas components (C/S, C/Cl, S/Cl, C/F, S/F, and Cl/F) significantly increased just prior to the eruption. The eruption at the Kudriavy volcano in 1999 was likely a phreatic eruption as a result of the intense precipitations after unusually long dry period. Meteoric water penetrated into the hot zone of volcano edifice and rapidly boiled causing the eruption.
Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions (2013)
Almeev Renat R., Kimura Jun-Ichi, Ariskin Alexei A., Ozerov Alexey Yu. Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions // Journal of Volcanology and Geothermal Research. 2013. Vol. 263. P. 141 - 171. doi: 10.1016/j.jvolgeores.2013.01.003.    Annotation
We present a new dataset for whole-rock major, trace, isotopic, and phenocryst compositions indicating a genetic link between andesites of the Holocene eruptions of the Bezymianny stratovolcano (the Bezymianny stage), the andesitic to dacitic Late Pleistocene lava dome complex (the pre-Bezymianny stage), and the magnesian to high-alumina basalts of the adjacent Kliuchevskoi Volcano. We demonstrate that volcanic products from the Bezymianny stage of volcano evolution are most likely the products of magma mixing between silicic products of the earliest stages of magma fractionation and the less evolved basaltic andesite parental melts periodically injected into the magma reservoir. In contrast, the intermediate and silicic magmas of the pre-Bezymianny stage together with basalts from Kliuchevskoi much more closely resemble the liquid line of descent and may represent a unique prolonged and continuous calc-alkaline trend of magma evolution from high-magnesian basalt to dacite. As a result of the geothermobarometry, we recognize variable conditions of magma fractionation and magma storage beneath Bezymianny for different magma types during its evolution since the Late Pleistocene: (1) 1100–1150 °C, 500–640 MPa, 1–2.5 wt. H2O for parental basaltic andesite; (2) 1130–1050 °C, 700–600 MPa, 2.5–5 wt. H2O for two-pyroxene andesites; (3) 1040–990 °C, 560–470 MPa, 5–6.5 wt. H2O for orthopyroxene-bearing andesites; (4) 950–1000 °C, 450–150 MPa, 3.5–5.5 wt. H2O for hornblende-bearing andesites; and (5) 950–900 °C, 410–250 MPa, 6–7 wt. H2O for dacites. Repeated basalt injections and magma fractionation combined with internal mixing in the magma chamber are the main processes responsible for both the complex petrography and the geochemical trends observed in the lavas of Bezymianny Volcano.
Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas (2020)
Melnik O., Lyakhovsky V., Shapiro Nikolay M., Galina N., Bergal-Kuvikas Olga Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas // Nature Communication. 2020. Vol. 11. № 3918. doi: 10.1038/s41467-020-17759-4.    Annotation
Deep long-period (DLP) earthquakes observed beneath active volcanoes are sometimes considered as precursors to eruptions. Their origin remains, however, unclear. Here, we present a possible DLP generating mechanism related to the rapid growth of gas bubbles in response to the slow decompression of over-saturated magma. For certain values of the gas and bubble content, the elastic deformation of surrounding rocks forced by the expanding bubbly magma can be fast enough to generate seismic waves. We show that amplitudes and frequencies of DLP earthquakes observed beneath the Klyuchevskoy volcano (Kamchatka, Russia) can be predicted by our model when considering pressure changes of ~107 Pa in a volume of ~103–104 m3 and realistic magma compositions. Our results show importance of the deep degassing in the generation of volcanic seismicity and suggest that the DLP swarms beneath active volcanoes might be related to the pulses of volatile-rich basaltic magmas rising from the mantle.
Deformations and Morphology Changes Associated with the 2016–2017 Eruption Sequence at Bezymianny Volcano, Kamchatka (2019)
Mania Rene, Walter Thomas, Belousova Marina, Belousov Alexander, Senyukov Sergey Deformations and Morphology Changes Associated with the 2016–2017 Eruption Sequence at Bezymianny Volcano, Kamchatka // Remote Sensing. 2019. № 11. P. 1278 doi: 10.3390/rs11111278.
Deformations and earthquakes of Kliuchevskoi Volcano: a model of its activity (1987)
Fedotov S.A., Gorelchik V.I., Zharinov N.A. Deformations and earthquakes of Kliuchevskoi Volcano: a model of its activity // Comptes rendus of the XIX General Assembly of the I.U.G.G.: Vancouver, August 9-22, 1987. 1987. Vol. 2. P. 392
Degassing explosion at Karymsky volcano, Kamchatka (1998)
Lees J.M., Johnson J.B., Gordeev E.I., Ozerov A.Yu. Degassing explosion at Karymsky volcano, Kamchatka // Abstracts of international seismic volcanic workshop on Kamchatkan and Alaska-Aleutian island arcs, Petropavlovsk-Kamchatsky, July 1-9, 1998. 1998. P. 23
Deposits of the 30 March 1956 directed blast at Bezymianny volcano, Kamchatka, Russia (1996)
Belousov Alexander Deposits of the 30 March 1956 directed blast at Bezymianny volcano, Kamchatka, Russia // Bulletin of Volcanology. 1996. Vol. 57. № 8. P. 649-662. doi:10.1007/s004450050118.
Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues (2010)
Belousov Alexander, Belousova Marina, Chen Chang-Hwa, Zellmer Georg F. Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues // Journal of Volcanology and Geothermal Research. 2010. Vol. 191. № 3-4. P. 205-221. doi:10.1016/j.jvolgeores.2010.02.001.
Deposits, petrology and mechanism of the 2010–2013 eruption of Kizimen volcano in Kamchatka, Russia (2018)
Auer A., Belousov A., Belousova M. Deposits, petrology and mechanism of the 2010–2013 eruption of Kizimen volcano in Kamchatka, Russia // Bulletin of Volcanology. 2018. Vol. 80. № 33.



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