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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 | Journal: | Journal of Volcanology and Geothermal Research | Series/Report no.: | 4/188(2009) | Publisher: | Elsevier | Issue Date: | 15-Dec-2009 | DOI: | 10.1016/j.jvolgeores.2009.10.005 | Keywords: | magmatic degassing remote sensing gas imaging Stromboli Strombolian explosions |
Subject Classification: | 04. 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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