Institute of Volcanology and Seismology
Institute of Volcanology and Seismology FEB RAS RepositoryNot a member yet
4080 research outputs found
Sort by
Магматические системы и условия глубинной гидротермальной циркуляции Ключевской группы вулканов по данным локальной сейсмичности и термогидродинамического моделирования
Get PDFSatellite and Ground-Based Observations of Explosive Eruptions on Zhupanovsky Volcano, Kamchatka, Russia in 2013 and in 2014–2016
Get PDFThe active andesitic Zhupanovsky Volcano consists of four coalesced stratovolcano cones. The historical explosive eruptions of 1940, 1957, and 2014‒2016 discharged material from the Priemysh Cone. The recent Zhupanovsky eruptions were studied using satellite data supplied by the Monitoring of Active Volcanoes in Kamchatka and on the Kuril Islands information system (VolSatView), as well as based on video and visual observations of the volcano. The first eruption started on October 22 and lasted until October 24, 2013. Fumaroles situated on the Priemysh western slope were the centers that discharged gas plumes charged with some amount of ash. The next eruption started on June 6, 2014 and lasted until November 20, 2016. The explosive activity of Zhupanovsky was not uniform in 2014–2016, with the ash plumes being detected on satellite images for an approximate total duration of 112 days spread over 17 months. The most vigorous activity was observed between June and October, and in November 2014, with a bright thermal anomaly being nearly constantly seen on satellite images around Priemysh between January and April 2015 and in January–February 2016. The 2014–2016 eruption culminated in explosive events and collapse of parts of the Priemysh Cone on July 12 and 14, November 30, 2015, and on February 12 and November 20, 2016
Scenario of the 1996 volcanic tsunamis in Karymskoye Lake, Kamchatka, inferred from X-ray tomography of heavy minerals in tsunami deposits
Get PDFSpatial and morphometric analyses of Anaun monogenetic volcanic field (Sredinny Range, Kamchatka)
Get PDFMonogenetic 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
Удинская сейсмическая активизация 2017–2018 гг.
Get PDFОбсуждается активизация сейсмичности под Удинскими вулканами, свидетельствующая о возможном возобновлении их вулканической активности. Значимость активизации проанализирована по методике статистической оценки уровня сейсмичности СОУС’09, применяющейся для мониторинга сейсмичности Камчатки
Извержения вулкана Эбеко (Курильские острова) в 2016−2017 гг.
Get PDFПриводятся данные о двух эксплозивных извержениях вулкана Эбеко в 2016−2017 гг.: 19−20 октября 2016 г. и с 8 ноября 2016 г. по конец августа 2017 г. Второе извержение продолжается. Эруптивный материал поступал из трех жерл: одного в Активной воронке и двух на дне Среднего кратера. Исследованы химический, минеральный и гранулометрический составы тефры. По составу тефры, которая представлена резургентным материалом, извержения классифицируются авторами как фреатические. Дается оценка состава и объема газовой эмиссии. Общая масса изверженного материала за рассмотренный период составила чуть больше 1.5 млн т
First Historical Eruption of Kambalny Volcano
Get PDFThe first historical eruption of Kambalny volcano began on March 24, 2017 with the powerful ash emission from the summit crater reaching as high as 6 km above sea level. The explosive activity continued without interruption from March 24 to March 30. The most powerful ash emission was registered on March 25–26, when the ash plume drifted several thousand kilometers SW, S, and SE from the volcano. On April 2 and April 9, after several calm days, powerful ash explosions occurred generating ash plumes up to 7 km high. The area of the land and sea over which the ash plume drifted during the day of March 25, was 650000 km2; the area of the ash accumulation on the land that was formed from March 24 to April 9, exceeded 1500 km2. These parameters were measured using the satellite-based data in the VolSatView information system. Domination of the silty fraction and the presence of secondary minerals (pyrite, gypsum, sulfur, and others) in the ash point to the phreatic character of the volcanic eruption
Сравнение информации о пепловых шлейфах вулканов, получаемой на основе численного моделирования и обработки спутниковых данных
No full textГеоэкологическое обоснование освоения природных ресурсов Камчатского края в условиях сейсмичности (Юго-Запад Корякского нагорья)
Get PDFГеологическим обоснованием объяснены взаимно ортогональные облака афтершоков сильных Хаилинского (1991 г.) и Олюторского (2006 г.) землетрясений. Их локализация происходит в разных разломных и складчато-блоковых геоструктурах. Их единый эпицентр лежит на вертикальной порово-трещинной колонне, проходящей через кили всех горизонтов прогнутого разреза литосферы Олюторского залива. Территория облаков афтершоков и эпицентров главных толчков рассматривается как высокомагнитудный Хаилинский центр на юго-западе Корякского сейсмического пояса. Пояс обрамляет с севера малую литосферную плиту Берингию, простираясь по южному побережью СВ Азии. Оба типа геологической локализации и релаксации определены как инструмент прогноза землетрясений