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Mechanism of the historical and the ongoing Vulcanian eruptions of Ebeko volcano, Northern Kuriles by A. Belousov; M. Belousova; A. Auer; T. R. Walter; T. Kotenko is a Earth and Planetary Sciences article available to read on EtoBox.

What is Mechanism of the historical and the ongoing Vulcanian eruptions of Ebeko volcano, Northern Kuriles about?

Ebeko is one of the most active volcanoes of the kurile island arc, producing frequent mild vulcanian explosions with eruption clouds up to 5 km high. the volcano poses a serious threat to the severo-kurilsk town with a population of around 2500 inhabitants, located at a distance of only 7 km on a fan of the volcano's laharic deposits. here, we report an overview of the activity of the volcano in the 20th-21st centuries and the results of our geological and petrological investigations of the ongoing vulcanian eruption that started in 2016. we have found that eruptions of ebeko span a range of mechanisms from purely magmatic to phreatic/hydrothermal. three of its historical eruptions (the 1934-1935, 1987-1991, and the 2016-ongoing) involved fresh magma, while during the others (1967-1971, 2009-2011) fresh magma was not erupted. juvenile material of the ongoing eruption represents highly crystalline and highly viscous (more than 10 pa s) low-silica (56-58 wt% sio) andesite. historical data and our observations of the ongoing eruption allowed us to suggest a functional model of the volcano where vulcanian explosions are caused by shallow intrusions of small diapir-like batches of stro

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Author

A. Belousov; M. Belousova; A. Auer; T. R. Walter; T. Kotenko

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)