Institute of Volcanology and Seismology
Institute of Volcanology and Seismology FEB RAS RepositoryNot a member yet
4080 research outputs found
Sort by
Dacitic Ash from the Andesitic Sheveluch Volcano, Kamchatka
No full textSheveluch Volcano is one of the most productive volcanoes in Kamchatka, characterized during the Holocene by alternating periods of predominantly extrusive and explosive activity. New data on the volumetric parameters of fine ash emissions have been obtained, indicating that the mass of erupted material of dacitic composition during a single moderate-strength eruption can exceed 2 million tons. In those years when gas and ash cloud eruptions were particularly frequent (sometimes more than twenty per month), the total mass of fine dacitic ash can be comparable to the annual discharge of andesitic material (extrusive lavas and tephra), providing a new perspective on the genesis of andesites
Tsunami from the Mw 8.8 Kamchatka Earthquake of 29 July 2025 on the East Coast of Kamchatka and the North Kuril Islands
No full textThe tsunami generated by the 29 July (30 July locally) Mw 8.8 Kamchatka-Kuril earthquake produced significant runup in both the far- and nearfield. Along the southeastern coast of Kamchatka and North Kuril Islands, for a distance of at least 550 km proximal to the rupture, runups reached at least 2–3 m, typically 5–10 m, with maximum runups of 10–16 m over a 100-km stretch of Kamchatka (centered on Vestnik Bay) and also on Paramushir Island. Via a range of methods, we tabulated more than 550 runup (vertical) and inundation (horizontal) tsunami measurements from Shipunsky Peninsula on Kamchatka to Mussel Bay on Onekotan Island. We employed several means of tsunami measurement. The most comprehensive data are from post-tsunami aerial photography along the coast via helicopter, with subsequent application of 2-m Arctic DEM to determine elevations. Instrumental tsunami measurements were made on the islands of Paramushir, Shumshu, Atlasova and Onekotan. Expeditionary studies of the tsunami's effects were also conducted on the coast of Avachinsky Bay near Petropavlovsk-Kamchatsky. Continuous lines of maximum inundation were mapped for many coastal areas based on the aerial survey data. Additional points of runup and inundation can be generated from these lines. Long inundation distances for the 2025 tsunami are usually in cases of tsunami penetration up low river valleys. There are several examples of high tsunami runup up steep coastal slopes and narrow stream valleys, typically 15–18 m with an outlier of 33 m. In cases where that runup was unusually high (relative to other nearby elevations), we label the elevation the tsunami reached “splash” and interpret these as small-scale features representing complex, often high frequency, dynamics of the tsunami that scientists may not always be able to numerically recreate using the data to compare to models
Текущие возможности оценки высоты пепловых выбросов реализованные в информационной системе VolSatView на примере анализа эксплозивных извержений вулканов Ключевской и Крашенинникова в 2025 году
No full textПервое историческое извержение вулкана Крашенинникова (Камчатка) в 2025 г. по дистанционным данным
No full textНеоплейстоцен-голоценовый эксплозивный кальдерный вулканизм Большой Курильской гряды: распределение вулканов, природа и параметры становления магматических очагов
Get PDFВершинные извержения вулкана Ключевской в 1935-2024 гг.
Get PDFВ работе дана сравнительная характеристика вершинных извержений вулкана Ключевской в 1935-2024 гг. и пароксизмальных фаз наиболее сильных эруптивных событий
Активность вулканов Камчатки и Курил в 2024 г. и их опасность для авиации
Get PDFВ работе описана активность вулканов Камчатки и Курил в 2024 г. Эксплозивные извержения вулканов Шивелуч, Ключевской и Безымянный представляли опасность для международных и местных авиаперевозок, Карымский и Эбеко − для местных авиаперевозок
Спутниковый мониторинг извержения вулканов Ключевской и Крашенинникова в августе 2025 года
No full textThe 1935-2024 summit eruptions of the Klyuchevskoy volcano
No full textKlyuchevskoy is one of the most powerful active basaltic volcanoes in the world. Information about its eruptions has been known since 1697. This paper describes the summit eruptions of the volcano from 1935 to 1999, and analyzes such eruptions from 1935 to 2024. Between 1935 and 2024 30 summit eruptions occurred: 11 explosive eruptions lasting from 6 to 1110 days and 19 explosive–effusive eruptions lasting from 26 to 1100 days. It was found that paroxysmal phases of eruptive events with ash ascent to the maximum height (15 km above sea level) are characteristic only of explosive–effusive eruptions of the volcano. It was noted that paroxysmal phases of eruptions were observed, as a rule, 6–15 days or 1–2.5 months (rarely 2 days or 7 months) before their end, i.e., an increase in the power of ash ascent from the volcanic crater in some cases led to the emptying of the magma reservoir (for example, the eruption of 1994) and in other cases to the rise of new portions of lava to the daylight surface (for example, the eruptions of 1944 and 1987–1990)