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Records: 2610
Articles
Melekestsev I.V., Kirianov V.Yu. When will Avacha Volcano in Kamchatka erupt? // Volcanology and Seismology. 1988. Vol. 6. № 6. P. 943-952.
Melekestsev I.V., Sulerzhitskiy L.D., Bazanova L.I., Braitseva O.A., Florenskaya N.I. Holocene catastrophic lahars at Avacha and Koryakskiy volcanoes in Kamchatka // Volcanology and Seismology. 1996. Vol. 17. № 4-5. P. 561-570.
   Annotation
Remnants of five catastrophic lahars have been discovered, described, and dated by the carbon-14 method. They occurred during eruptions of Avacha (violent explosions with voluminous juvenile pyroclastics) and Koryakskiy (large fissure lava flows): 3500 to 3200 14C years ago or 1900-1500 years B.C. These lahars were much higher in vigor, hazard, and effect on the environment than the lahars generated by the historic eruptions of these volcanoes. -from Journal summary
Melekestsev Ivan V., Ponomareva Vera V., Volynets Oleg N. Kizimen volcano, Kamchatka — A future Mount St. Helens? // Journal of Volcanology and Geothermal Research. 1995. Vol. 65. № 3-4. P. 205-226.
   Annotation

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 Communications. 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.
Melnikov D.V., Manevich A.G., Girina O.A. Correlation of the satellite and video data for operative monitoring of volcanic activity in Kamchatka // JKASP-2018. Petropavlovsk-Kamchatsky: IVS FEB RAS. 2018.
Melnikov D.V., Volynets Anna Spatial and morphometric analyses of Anaun monogenetic volcanic field (Sredinny Range, Kamchatka) // 7th International Maar Conference, Olot, Catalonia, Spain. 2018. P. 61
   Annotation
Monogenetic volcanic fields are frequently located in the faulted area and in clusters which are associated with the particular geometry of the magmatic chambers and structures of the magma plumbing system in the crust. The method of cluster analyses of the spatial distribution and morphometric characteristics of the cinder cones was used in our research of the conditions of origin and evolution of one of the largest monogenetic fields in Kamchat-ka back-arc-the Anaunsky Dol, or Anaun MVF. Kamchat-ka subduction system is located at the northwestern part of the Pacific at the convergent boundary of the Okhotsk and Pacific plates. Today, Sredinny Range represents its back-arc part and is characterized by the wide distribution of the monogenetic volcanic fields: it has more than 1000 cinder cones, which deposits cover the area of about 8500 km2 (Laverov, 2005; Ogorodov et al., 1972) (Fig. 1). Sredinny Range has a complex structure with several volcanic provinces with different geological history and variable composition of products. Anaun monogenetic volcanic field occupies one of the lowest sections of the whole Sredinny Range. The youngest volcanism in this area (according to the geological map, it was formed in Quaternary times, although our geochemical research and isotopic dating shows its earlier age) is confined to the lowered block of basement rocks. Shield volcanoes, volcanic ridges, cinder and lava cones are located on a low-laying volcanic dale. We made an attempt to make a spatial analysis of distribution of the volcanic edifices and to quantitatively estimate the structural control of the magma plumbing channels. Based on a digital relief model (DEM SRTM, spatial resolution 30 m) we distinguished more than 100 morphometrically expressed cinder cones. For them, using semi-automatic mode, we estimated the morphometric characteristics: height, diameter of the basement, height/basement ratio, angle of the slope, volume of the edifice. With time, cinder cones change their shape due to the erosion processes. Therefore, finally the edifice height is decreased while the basement diameter increased. Determination of the morphometric parameters allowed us to compose a relative age scale for the cinder cones located in Anaun monogenetic volcanic field. Spatial analysis has shown that cones tend to form series of clusters, which are associated with the systems of lineaments. Statistically significant patterns in the cinder cones distribution were then compared with the strike of lineaments to estimate possible location of the magma feeding channels.
Melnikov Dmitry, Malik Nataliya, Chaplygin Ilya, Zelenski Mikhail First data on the volatile fluxes from passively degassing volcanoes of the Kuril Island arc // EGU General Assembly 2017. 2017. Vol. 19.
Melnikov Dmitry, Volynets Anna O. Remote sensing and petrological observations on the 2012–2013 fissure eruption at Tolbachik volcano, Kamchatka: Implications for reconstruction of the eruption chronology // Journal of Volcanology and Geothermal Research. 2015. Vol. 307. P. 89 - 97. doi: 10.1016/j.jvolgeores.2015.09.025.
   Annotation
Abstract We present a reconstruction of the chronological sequence of events that took place during the first days of the 2012–2013 Tolbachik fissure eruption using petrological data and remote sensing methods. We were forced to use this approach because bad weather conditions did not allow direct observations during the first two days of the eruption. We interpreted infrared images from the scanning radiometer {VIIRS} Suomi {NPP} and correlated the output with the results of the geochemical study, including comparison of the ash, deposited at the period from 27 to 29 November, with the samples of lava and bombs erupted from the Menyailov and Naboko vents. We argue that the compositional change observed in the eruption products (the decrease of SiO2 concentration and K2O/MgO ratio, increase of MgO concentration and Mg#) started approximately 24 h after the eruption began. At this time the center of activity moved to the southern part of the fissure, where the Naboko group of vents was formed; therefore, this timeframe also characterizes the timing of the Naboko vent opening. The Naboko group of vents remained active until the end of eruption in September 2013.
Menyailov I.A., Nikitina L.P., Shapar V.N. Results of geochemical monitoring of the activity of Ebeko volcano (Kurile Islands) used for eruption prediction // Journal of Geodynamics. 1985. Vol. 3. № 3-4. P. 259 - 274. doi: 10.1016/0264-3707(85)90038-9.
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The monitoring of the state of active volcanoes, carried out using different parameters, including geochemical, is very important for studies of deep processes and geodynamics. All changes which occur within the crater before eruptions reflect the magma activation and depend on the deep structure of volcano. This paper gives the results of prolonged monitoring of Ebeko volcano, located in the contact zone between the oceanic and continental plates (the Kurile Island Arc). The geochemical method has been used as the basis for eruption prediction because the increase in the activity of the Ebeko in the period from 1963 to 1967 that ended in a phreatic eruption was not preceded by seismic preparation. Investigations carried out at Ebeko volcano give evidence that change of all the chosen geochemical parameters is a prognostic indicator of a forthcoming eruption. This change depends on the type of eruption, and the deep structure and hydrodynamic regime of the volcano.
Miller T.P., Kirianov V.Yu. Volcanic Ash Hazard along the North Pacific (NOPAC) Air Routs: Kurile Islands - Kamchatka - Alaska // Proc. of the 95 International workshop on Volcanoes Commemorating the 50-th Anniversary of the Mt. Shova-Shinzan: Short papers and Abstracts. 1995.