Dynamics and viscosity of 'a'a and pahoehoe lava flows of the 2012-13 eruption of Tolbachik volcano, Kamchatka, Russia

Авторы: Belousov A., Belousova M.
Журнал: Bulletin of Volcanology
Том: 80
Номер: 6
Год издания: 2018
Издательство: Springer Verlag
Местоположение издательства: Germany
DOI: 10.1007/s00445-017-1180-2
Аннотация: The 2012–2013 flank eruption of Tolbachik volcano (Kamchatka) lasted 9 months and produced 0.54 km 3 of basaltic trachyandesite lava, thus becoming one of the most voluminous historical lava effusions of basic composition in subduction-related environments globally. From March to July 2013, the volcano monotonously erupted lava of constant composition (SiO2 = 52 wt%) with a nearly stable effusion rate of 18 m3/s. We report results of instrumental field measurements of the ‘a’a and pahoehoe flow dynamics (documented with time-lapse cameras) as well as the lava viscosity determined by flow rate and shear stress (using penetrometer) methods. Maximal propagation velocities of the ‘a’afronts ranged from 2 to 25 mm/s, and those of the pahoehoe from 0.5 to 6 mm/s.
Добавил в систему: Белоусов Александр Борисович

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