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Records: 2567
Articles
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.
Кугаенко Ю.А., Павлов В.М., Иванова Е.И., Абубакиров И.Р., Салтыков В.А. Толудская вспышка сейсмичности и землетрясение 30.11.2012 г. (MС = 5.4, MW = 4.8), сопровождавшие начало Толбачинского извержения 2012-2013 гг. // Вулканология и сейсмология. 2017. № 6. С. 33-48. doi: DOI: 10.7868/S0203030617060049.
   Annotation
This paper reports a study of the Tolud earthquake sequence; the sequence was a burst of shallow
seismicity between November 28 and December 7, 2012; it accompanied the initial phase in the Tolbachik
Fissure Eruption of 2012‒2013. The largest earthquake (the Tolud earthquake of November 30, 2012, to be
referred to as the Tolud Earthquake in what follows, with KS = 11.3, ML = 4.9, MС = 5.4, and MW = 4.8) is
one of the five larger seismic events that have been recorded at depths shallower than 10 km beneath the entire Klyuchevskoi Volcanic Cluster in 1961‒2015. It was found that the Tolud earthquake sequence was the foreshock–aftershock process of the Tolud Earthquake. This is one of the larger seismicity episodes ever to have
occurred in the volcanic areas of Kamchatka. Data of the Kamchatka seismic stations were used to compute
some parameters for the Tolud Earthquake and its largest (МL = 4.3) aftershock; the parameters include the
source parameters and mechanisms, and the moment magnitudes, since no information on these is available
at the world seismological data centers. The focal mechanisms for the Tolud Earthquake and for its aftershock are consistent with seismic ruptures at a tension fault in the rift zone. Instrumental data were used to estimate the intensity of shaking due to the Tolud Earthquake. We discuss the sequence of events that was a signature of the time-dependent seismic and volcanic activity that took place in the Tolbachik zone in late November 2012 and terminated in the Tolud burst of seismicity. Based on the current ideas of the tectonics and magma sources for the Tolbachik volcanic zone, we discuss possible causes of these earthquakes.
Кугаенко Ю.А., Салтыков В.А., Абкадыров И.Ф., Воропаев П.В. Временные сейсмологические наблюдения в районе трещинного Толбачинского извержения 2012-2013 гг. И их результаты // Вулканология и сейсмология. 2017. № 4. С. 67-82. doi: 10.7868/S0203030617040058.
   Annotation
The seismicity that accompanied the Tolbachik Fissure Eruption was recorded by additional seismic stations that were installed in the southern Klyuchevskoi Volcanic Cluster area in January to October 2013. We used broadband (0.033–50 Hz) three-component digital Guralp CMG-6TD seismometers. This temporary network provided seismicity data at a lower energy level than can be done using the regional seismograph network of Kamchatka. The processing of the resulting digital records supplied data for compiling a catalog of over 700 ML=0–3.5 (КS=1.5–8.5) earthquakes, which is an order of magnitude greater than the number of events located by the regional network for the same period of time. The seismicity in the area of Ploskii Tolbachik Volcano was found to concentrate mostly in spatially isolated areas during the eruption. The main isolated clusters of earthquakes were identified both in the eruption area itself and along the periphery of Ploskii Tolbachik Volcano, in the area of the Zimina volcanic massif, and in the Tolud epicenter zone; the eruption zone was not dominant in the seismicity. The region of a shallow seismicity increase beneath Ploskii Tolbachik before the eruption was not found to exhibit any increased activity during the time the temporary seismograph network was operated, which means that a seismicity inversion took place at the beginning of the eruption. We discuss the question of what the earthquake-generating features are that we have identified.