Please use this identifier to cite or link to this item:
Authors: Chouet, B.* 
Dawson, P.* 
Martini, M.* 
Title: Shallow-conduit dynamics at Stromboli Volcano, Italy, imaged from waveform inversions
Journal: Geological Society, London, Special Publications 
Series/Report no.: /307(2008)
Publisher: The Geological Society of London
Issue Date: 2008
DOI: 10.1144/SP307.5
Keywords: Shallow-conduit dynamics
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
Abstract: Modelling of Very-Long-Period (VLP) seismic data recorded during explosive activity at Stromboli in 1997 provides an image of the uppermost 1 km of its volcanic plumbing system. Two distinct dyke-like conduit structures are identified, each representative of explosive eruptions from two different vents located near the northern and southern perimeters of the summit crater. Observed volumetric changes in the dykes are viewed as the result of a piston-like action of the magma associated with the disruption of a gas slug transiting through discontinuities in the dyke apertures. Accompanying these volumetric source components are single vertical forces resulting from an exchange of linear momentum between the source and the Earth. In the dyke system underlying the northern vent, a primary disruption site is observed at an elevation near 440 m where a bifurcation in the conduit occurs. At a depth of 80 m below sea level, a sharp corner in the conduit marks another location where the elastic response of the solid to the action of the upper source induces pressure and momentum changes in the magma. In the conduit underlying the southern vent, the junction of two inclined dykes with a sub-vertical dyke at 520 m elevation is a primary site of gas slug disruption, and another conduit corner 280 m below sea level represents a coupling location between the elastic response of the solid and fluid motion.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat Existing users please Login
ChoDaw-08.pdf3.17 MBAdobe PDF
Show full item record

Page view(s) 50

checked on Jun 30, 2022


checked on Jun 30, 2022

Google ScholarTM