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Shiveluch volcano: seismicity, deep structure and forecasting eruptions (Kamchatka)

Gorelchik V.I., Shirokov V.A., Firstov P.P., Chubarova O.S. (1997) Shiveluch volcano: seismicity, deep structure and forecasting eruptions (Kamchatka) // Journal of Volcanology and Geothermal Research. Vol. 78, No. 1–2. pp. 121 - 137. doi: 10.1016/S0377-0273(96)00108-4.

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

The deep structure, Wadati-Benioff zone (focal zone) geometry and the magma feeding system of Shiveluch volcano are investigated based on 1962–1994 detailed seismic surveillance. A focal zone beneath Shiveluch is dipping at an angle of 70° at depths of 100–200 km. Based on the revealed interrelations between seismicity at depths of 105–120 km and an extrusive phase of its eruptions in 1980 through 1994, it is inferred that primary magmas, periodically feeding the crustal chamber, are melted at depths of at least 100 km. An upsurge of extrusive-explosive activity at the volcano is preceded and accompanied by the increasing number and energy of both volcanic earthquakes beneath the dome and tectonic or volcano-tectonic earthquakes in the zones of NW-striking crustal faults near the volcano.The eruption of April 1993 has been the most powerful since 1964. It was successfully predicted based on interactive use of all seismic data. At the same time the influence of seismicity at depths of 105–120 km under the volcano on the style (and consequently on prediction) of its activity is decisive.
Item Type: Article
Title: Shiveluch volcano: seismicity, deep structure and forecasting eruptions (Kamchatka)
Language: English
Journal or Publication Title: Journal of Volcanology and Geothermal Research
ISSN Print: 0377-0273
Uncontrolled Keywords: volcano, eruption, focal zone, volcanic earthquake, deep structure, magma chamber
Subjects: State scientific and technical information rubricator (ГРНТИ) > 37 ГЕОФИЗИКА > 37.31 Физика Земли > 37.31.19 Сейсмология
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Sheveluch
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Sheveluch
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Sheveluch
Depositing User: И.М. Романова
Date Deposited: 17 Dec 2015 04:50
Last Modified: 17 Dec 2015 04:50
URI: http://repo.kscnet.ru/id/eprint/2571

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