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Seismological Studies on the Mechanism of the Large Tolbachik Fissure Eruption, 1975-1976

Fedotov S.A., Gorelchik V.I., Stepanov V.V. (1980) Seismological Studies on the Mechanism of the Large Tolbachik Fissure Eruption, 1975-1976 // Bulletin Volcanologique / Пийп Б.И. ed. Vol. 43, No. 1. pp. 73-84.

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Abstract

Seismological observations provided consistent information on the course and mechanism of the complicated large fissure eruption at Tolbachik volcano in Kamchatka from July 6, 1975 to December 10, 1976. Seismicity indicates that the initial magnesian basalts were rising ten days before the eruption from depths of more than 20 km. The formation of new feeding dykes was accompanied by earthquake swarms which decreased sharply one to two days before the opening of new eruptive fissures. The seismological data indicate that the main source of the different erupted basalts (2 km) was a vast system (diameter ca. 80 km) of hydraulically connected magma chambers located in the lower crustal layers or in the crust-mantle transition layer.
Item Type: Article
Title: Seismological Studies on the Mechanism of the Large Tolbachik Fissure Eruption, 1975-1976
Language: English
Journal or Publication Title: Bulletin Volcanologique
ISSN Print: 0366-483X
ISSN Online: 1432-0819
Subjects: State scientific and technical information rubricator (ГРНТИ) > 37 ГЕОФИЗИКА > 37.31 Физика Земли > 37.31.19 Сейсмология
State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Plosky Tolbachik
Depositing User: С.Э. Васильев
Date Deposited: 08 Oct 2014 02:51
Last Modified: 08 Oct 2014 02:51
URI: http://repo.kscnet.ru/id/eprint/1823

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