Pyroclastic surges and flows from the 8-10 May 1997 explosive eruption of Bezymianny volcano, Kamchatka,Russia

Авторы: Belousov A., Voight B., Belousova M., Petukhin A.
Журнал: Bulletin of Volcanology
Номер: 64
Год издания: 2002
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 455
Последняя страница: 471
DOI: 10.1007/s00445-002-0222-5
Аннотация: The 8–10 May 1997 eruption of Bezymianny volcano began with extrusion of a crystallized plug from the vent in the upper part of the dome. Progressive gravitational collapses of the plug caused decompression ofhighly crystalline magma in the upper conduit, leading at 13:12 local time on 9 May to a powerful, vertical Vulcanian explosion. The dense pyroclastic mixture collapsed in boil-over style to generate a pyroclastic surge which was focused toward the southeast by the steep-walled, 1956 horseshoe-shaped crater. This surge, with a temperature <200 °C, covered an elliptical area >30 km2 with deposits as much as 30 cm thick and extending 7 km from the vent.
Добавил в систему: Белоусов Александр Борисович

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