Quantification of the gas mass emitted during single explosions on Stromboli with the SO2 imaging camera |
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| Authors: | Toshiya Mori Mike Burton |
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| Institution: | 1. Michigan Technological University, Department of Geological and Mining Engineering and Sciences, 1400 Townsend Dr., Houghton, MI 49931, USA;2. Cascades Volcano Observatory, U.S. Geological Survey, 1300 SE Cardinal Ct., Vancouver, WA 98683, USA;3. Hawaiian Volcano Observatory, U.S. Geological Survey, P.O. Box 51, Hawai''i Volcanoes National Park, HI 96718, USA;1. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Via della Faggiola 32, 56126 Pisa, Italy;2. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli, via Diocleziano 328, 80124 Napoli, Italy;1. Center for Integrated Research and Education of Natural Hazards, Shizuoka University, Shizuoka 422-8529, Japan;2. Institute of Geosciences, Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan;3. Geochemical Research Center, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan;4. Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan;5. Environmental Research Division, Instituto Tecnológico y de Energías Renovables (ITER), 38611 Granadilla de Abona, Tenerife, Spain;6. Instituto Volcanológico de Canarias (INVOLCAN), Antiguo Hotel Taoro, Parque Taoro, 22, 38400 Puerto de La Cruz, Tenerife, Spain;7. Izu Peninsula Geopark Promotion Council, Ito, Shizuoka 414-8555, Japan;8. Faculty of Education, Shizuoka University, Shizuoka 422-8529, Japan |
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| 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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