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Authors: Marchetti, E.*
Ripepe, M.*
Ulivieri, G.*
Burton, M. R.*
Caltabiano, T.*
Salerno, G.*
Editors: Calvari, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia
Inguaggiato, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia
Puglisi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia
Ripepe, M.; Università degli Studi di Firenze, Firenze, Italia
Rosi, M.; Università degli Studi di Pisa, Pisa, Italia
Title: Gas Flux Rate and Migration of the Magma Column
Issue Date: 2008
Keywords: Stromboli
SO2 Flux
Magma column
Abstract: The 2002–2003 effusive eruption of Stromboli volcano represents an excellent opportunity to investigate the transition from effusive to explosive activity at an open-conduit basaltic system, when activity migrated from effusive vents, at the base of the craters, to summit explosions. The transition is investigated here through the analysis of very long period seismicity, delay times between infrasonic and thermal onsets of explosions, and SO2 flux recorded during a 1-year period. The synergy of the multiple geophysical observations points to a magma-driven migration of the magma column. Here the increased magma supply at the eruption onset lead to opening of effusive fissures, which draining the magma in the shallow conduit caused the decrease of the magma level. The decrease of the magma supply at the end of the effusion lead to sealing of effusive fissures, upraise of the magma level within the conduit, and reestablishment of explosive activity from the summit vents.
Appears in Collections:Book chapters
04.08.01. Gases
04.08.06. Volcano monitoring

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