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Records: 2122
Articles
Котенко Т.А., Котенко Л.В., Шапарь В.Н. Активизация вулкана Эбеко в 2005-2006 гг. (Остров Парамушир, Северные Курильские о-ва) // Вулканология и сейсмология. 2007. № 5. С. 3-13.
Котенко Т.А., Мельников Д.В., Тарасов К.В. Газовая эмиссия вулкана Эбеко (Курильские острова) в 2003–2021 гг.: геохимия, потоки и индикаторы активности // Вулканология и сейсмология. 2022. № 4. С. 31-46. doi: 10.31857/S0203030622040058.
   Annotation
This article reports new data on the chemical and isotopic composition of volcanic gases and the SO2 flux and the soil CO2 flux from the active Ebeko volcano. Within the time interval of 2003–2021 the volcano erupted in 2009, 2010, 2011, October 2016–November 2021. Volcanic gas composition for 2003–2016, 2021 were obtained by direct sampling from fumaroles. The high-temperature gas (420–529°C) has a composition typical of magmatic gases with C/S atomic ratios <1, HCl content 5–7 mmol/mol; isotopic composition of the volcanic vapor δD ~ –24, δ18O = 2.6–4.9. Geochemical precursors of eruptions have been established: an increase in concentrations of CO2, H2, SO2, HCl; a drop in the C/S ratio up to values of <1, which is characteristic of magmatic gases of the Kuriles; an increase in temperature; heavier values of δD and δ18O in the gas condensates; increasing of the total gas output. А high soil CO2 flux was measured using the accumulation chamber method at two thermal fields (up to 10442 g/m2/day), exceeding the visible discharge (~50 t/day versus ~40 t/day). SO2 flux from the active crater was measured by DOAS instruments in 2020 and 2021: they were 99 ± 28 and 9 ± 2.7 t/day in gas plumes, and 747 ± 220 and 450 ± 130 t/day in ash plumes, respectively. A decrease of SO2 output is associated with the rise of degassed magma before the end of the eruption.
Котенко Т.А., Сандимирова Е.И., Котенко Л.В. Извержения вулкана Эбеко (Курильские острова) в 2016−2017 гг. // Вестник КРАУНЦ. Серия: Науки о Земле. 2018. Вып. 37. № 1. С. 32-42.
   Annotation
The article presents data on two explosive eruptions produced by Ebeko Volcano 19 to 20 October, 2016 and over the period from November 8, 2016 till the end of August 2017. The latter eruption continues. The material was erupted from three vents: one vent is located in the Active funnel and two vents are at the bottom of Middle crater. The authors analyzed the chemical, mineral, and granulometric compositions of tephra. The studied tephra does not contain magmatic components. The authors classify the eruptions as phreatic. The paper provides the assessment of the composition and volume of gas emission. The gross total volume of the erupted material was estimated to exceed 1.5 million tons.
Кочегура В.В., Зубов А.Г. Шкала палеовековых вариаций геомагнитного поля для позднего голоцена Камчатки // Геомагнитное поле в фанерозое: тезисы докладов III Дальневосточного семинара по палеомагнетизму, Магадан, 21 августа 1984 г. Магадан: СВКНИИ ДВНЦ АН СССР. 1984. С. 10-11.
Кочегура В.В., Зубов А.Г., Брайцева О.А. Магнитостратиграфия голоценовых почвенно-пирокластических образований Камчатки // Вулканология и сейсмология. 1986. Вып. 1986. № 6. С. 3-17.
   Annotation
An account is given of magnetostratigraphic studies of Kamchatkan Holocene formations: the cover of soil and pyroclastics and the rocks of the cinder cones from the flank eruptions of Klyuchevskoi Volcano. А study was made of seven sections of the soil and pyroclastics and of samples from 17 cinder cones. А detailed account is given of the data processing procedure. Consideration is given to the reasons for the established incompleteness of the paleomagnetic record in the sections and it is demonstrated that adequately detailed reconstruction of the history of the geomagnetic 1ield is possible only provided that а study is made of а series of рагаllеl sections. The trajесtory of the geomagnetic field vector over the last 4000 years is determined on the basis of the material on radiocarbon datings. Seven cycles of paleosecular variations are distinguished in the age range investigated; each of these cycles has individual features by which they can be recognised and used for stratigraphic correlation. The, features taken were the direction of rotation of the vector, the shape and size of its loops, and the length of the cycles. Correlation of the sections based on paleomagnetic data was found to be in good agreement with the tephrostratigraphic correlation and enabled corrections to be made to the age of some horizons, including the archeological layers of the primitive settlement at Zhupanovo and the cinder cones. The metachronous magnetization present in some tephra layers was found to be an obstacle to any improvement in the accuracy and detail of magnetochronological reconstructions.
Краевая Т.С., Брайцева О.А., Шеймович В.С., Егорова И.А., Лупикина Е.Г. Внутрикальдерные четвертичные образования Камчатки (аспект палеовулканологических реконструкций) // Вулканизм и вулканоструктуры. Тбилиси: 1980. С. 13-15.
Крохин Е.М. О некоторых вулканических образованиях в бассейне рек Малой Быстрой, Левой Тополовой и Большой Саранной // Бюллетень вулканологической станции. 1954. Вып. 22. С. 39-43.
Кугаенко Ю.А., Воропаев П.В. Вариации статистической оценки уровня сейсмичности по шкале СОУС’09: вулкан Безымянный (Камчатка) // Вестник КРАУНЦ. Серия: Науки о Земле. 2015. Вып. 25. № 1. С. 31-40.
   Annotation
We use SESL’09 technique for a unified estimation of seismicity level in a given space-time regions. The application of the distribution function of radiated seismic energy permits the formalization of qualitative description of seismicity. We present the results from statistical estimations of seismicity level before the 2000- 2012 Bezymianny Volcano eruptions. The state of seismicity was describes by the monogram, constructed according the SESL’09 technique. By processing the Klyuchevskoy volcano group seismic catalog, we estimated variations of seismicity and detected background level. Statistically significant variations of the seismicity level preceded the eruptions were detected and discussed.
Кугаенко Ю.А., Мельников Д.В. Проявления техногенеза в геодинамически активном районе Мутновского геоэнергетического комплекса (Южная Камчатка) // География и природные ресурсы. 2006. № 3. С. 30-37.
Кугаенко Ю.А., Нуждина И.Н., Салтыков В.А. Особенности спектральных компонент вулканических землетрясений на примере вулканов Кизимен, Корякский, Мутновский и Горелый // Вестник КРАУНЦ. Серия: Науки о Земле. 2011. Вып. 18. № 2. С. 102-113.
   Annotation
The article presents a technique for formalized separation of volcano-tectonic earthquakes and low-frequency seismic events which occurred on volcanoes. The technique was used as a case study for four episodes of volcanic activity in Kamchatka based on data from seismic stations located near volcanoes: explosive eruption of Kizimen Volcano (2010-2011), activization of Gorely Volcano (2009-2011), activization of Koriaksky Volcano (2008-2009), long-term intense hydrothermal activity of Mutnovsky Volcano. For visualization of hidden correlation in waveform spectral characteristics we use the triangle diagram. We have targeted a trend in volcano investigation which supposes study of possible relation between types of volcano activity and distribution of spectral components in seismic records.