Chronology of Bezymianny Volcano activity, 1956–2010

Гирина, О.А.

doi:10.1016/j.jvolgeores.2013.05.002

Cited by 64 publications

(39 citation statements)

References 7 publications

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“…The Bezymianny volcano, located 10 km from Klyuchevskoy, is a highly explosive volcano with predominantly dacitic‐andesitic compositions [e.g., Bogoyavlenskaya et al , ; Braitseva et al , ; Girina , ]. We propose that this volcano is fed from the same mantle reservoir as the Klyuchevskoy volcano.…”

Section: Discussionmentioning

confidence: 99%

Three different types of plumbing system beneath the neighboring active volcanoes of Tolbachik, Bezymianny, and Klyuchevskoy in Kamchatka

et al. 2017

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The Klyuchevskoy group of volcanoes (KGV) in Kamchatka includes three presently active volcanoes (Klyuchevskoy, Bezymianny, and Tolbachik) located close together in an area of approximately 50 × 80 km. These three volcanoes have completely different compositions and eruption styles from each other. We have analyzed new data recorded by a temporary seismic network consisting of 22 seismic stations operated within the area of Tolbachik in 2014–2015 in conjunction with the data from the permanent network and the temporary PIRE network deployed at the Bezymianny volcano in 2009. The arrival times of the P and S waves were inverted using a local earthquake tomography algorithm to derive 3‐D seismic models of the crust beneath the KGV as well as accurate seismicity locations. High‐resolution structures beneath the Tolbachik volcanic complex were identified for the first time in this study. The tomography results reveal three different types of feeding system for the main KGV volcanoes. The basaltic lavas of the Klyuchevskoy volcano are supplied directly from a reservoir at a depth of 25–30 km through a nearly vertical pipe‐shaped conduit. The explosive Bezymianny volcano is fed through a dispersed system of crustal reservoirs where a lighter felsic material separates from the mafic component and ascends to the upper crust to form andesitic magma sources. For Tolbachik, low‐viscosity volatile‐saturated basalts ascend from two deep reservoirs following a system of fractures in the crust associated with the intersections of regional faults.

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Section: Discussionmentioning

confidence: 99%

Three different types of plumbing system beneath the neighboring active volcanoes of Tolbachik, Bezymianny, and Klyuchevskoy in Kamchatka

et al. 2017

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“…Bezymianny and Klyuchevskoy are located just ten kilometers from each other and have single zone of anomalous seismic attenuation (Tokarev and Zobin, 1970) that may indicate a genetic relationship, however the eruption styles and lava compositions of these volcanoes are completely different (e.g., Ozerov et al, 1997). Klyuchevskoy erupts mostly liquid basaltic lavas from its summit and peripheral cones, whereas, Bezymianny is characterized by explosive andesitic eruptions (e.g., Girina, 2013). The close proximity of these very different volcanic styles remains the subject of much debate.…”

Section: Magmatic Sources Beneath Klyuchevskoy and Bezymianny Volcanoesmentioning

confidence: 99%

Magma source beneath the Bezymianny volcano and its interconnection with Klyuchevskoy inferred from local earthquake seismic tomography

Ivanov

Koulakov

West

et al. 2016

Journal of Volcanology and Geothermal Research

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We present a new 3D model of P and S wave velocities and Vp/Vs ratio to km depth beneath the active Klyuchevskoy and Bezymianny volcanoes (Kamchatka, Russia). In this study, we use travel time data from local seismicity recorded by temporary stations of the PIRE experiment from October 24 to December 15, 2009 and permanent stations operated by the Kamchatkan Branch of Geophysical Survey (KBGS). The calculations were performed using the LOTOS code (Koulakov, 2009). The resolution limitations were explored using a series of synthetic tests with checkerboard patterns in the horizontal and vertical sections. At shallow depths, the resulting Vp and Vs anomalies tend to alternate on opposite sides of the lineation connecting the most active volcanic centers of the Klyuchevskoy Volcanic Group (KVG). This prominent lineation suggests the presence of a large fault zone passing throughout the KVG, consistent with regional tectonics. We suggest that this fault zone weakens the crust creating a natural pathway for magmas to reach the upper crust. Beneath Bezymianny volcano we observe a shallow anomaly of high Vp/Vs ratio extending to 5-6 km depth. Beneath Klyuchevskoy another high Vp/Vs anomaly is observed, at deeper depths of 7 and 15 km. These findings are consistent with the regional-scale model of Koulakov et al. (2013a) and provide some explanation for how very different eruption styles can be maintained at two volcanoes in close proximity over numerous eruption cycles.

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“…Безымянный (2882 м) является одним из самых активных вулканов Камчатки и мира [Girina, 2013]. Этот андезитовый вулкан расположен в центральной части Ключевской группы вулканов Камчатки, примерно в 315 км к северо-востоку от г. Петропавловск-Камчатский (см.…”

Section: краткая характеристика активностиunclassified

2016 volcano eruptions in Kamchatka and the Northern Kuriles and their danger to aviation

Гирина

Manevich

Melnikov

et al. 2019

Вулканология и сейсмология

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Strong explosive volcanic eruptions are extremely dangerous to the modern jet aircraft as they can produce several cubic kilometers of volcanic ash and aerosols that can be sent to the atmosphere and the stratosphere in several hours to several days during the eruption. In 2016, five from thirty active volcanoes erupted in Kamchatka (Sheveluch, Klyuchevskoy, Bezymianny, Karymsky, and Zhupanovsky) and three from six active volcanoes in the Northern Kuriles (Alaid, Ebeko, and Chikurachki). Effusive volcanic activity was noted at Sheveluch, Klyuchevskoy, Bezymianny and Alaid. All the volcanoes produced explosive activity. Strong explosive events occurred at Sheveluch mainly from September till December. Moderate ash emission had accompanied of Klyuchevskoy’s eruption through March till November. Explosive activity at Karymsky, Zhupanovsky, Alaid, and Chikurachki volcanoes was observed mainly in the first half of the year. The total area covered by ash in 2016 was estimated 600,000 km2, from which 460,000 km2 were related to the eruptions of Kamchatka volcanoes and 140,000 km2 were attributed to the eruption of the North Kuriles volcanoes. The activity at Sheveluch, Klyuchevskoy, and Zhupanovsky was dangerous to international and local airlines as explosions produced ash up to 10-12 km above sea level. The activity at Bezymianny, Karymsky, Alaid, Ebeko, and Chikurachki posed a threat to local aircrafts when explosions sent ash up to 5 km above sea level.

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Chronology of Bezymianny Volcano activity, 1956–2010

Cited by 64 publications

References 7 publications

Three different types of plumbing system beneath the neighboring active volcanoes of Tolbachik, Bezymianny, and Klyuchevskoy in Kamchatka

Three different types of plumbing system beneath the neighboring active volcanoes of Tolbachik, Bezymianny, and Klyuchevskoy in Kamchatka

Magma source beneath the Bezymianny volcano and its interconnection with Klyuchevskoy inferred from local earthquake seismic tomography

2016 volcano eruptions in Kamchatka and the Northern Kuriles and their danger to aviation

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