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Authors: Mori, T.* 
Burton, M. R.* 
Title: Quantification of the gas mass emitted during single explosions on Stromboli with the SO2 imaging camera
Issue Date: 15-Dec-2009
Series/Report no.: 4/188(2009)
DOI: 10.1016/j.jvolgeores.2009.10.005
Keywords: magmatic degassing
remote sensing
gas imaging
Strombolian explosions
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous 
Abstract: We performed measurements using an SO2 imaging camera of the SO2 gas mass emitted during five discrete explosive events on Stromboli volcano on 3 October 2006. The SO2 gas mass released during discrete explosions was 15–40 kg per explosion, producing 3–8% of the total daily SO2 gas emission, demonstrating that in terms of gas flux Strombolian explosions are a second-order phenomenon compared with quiescent degassing. Using the typical gas composition measured with OP-FTIR allows us to determine the total gas mass released during an explosion as 360–960 kg with a volume of 1500–4100 m3 at 1 bar. At the probable source pressure of gas slug formation of 75 MPa this gas amount would occupy a volume equivalent to a sphere with a radius of 0.8–1 m, comparable with estimates of Stromboli's conduit geometry.
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