USGS/Cascades Volcano Observatory, Vancouver, Washington
REPORT:
Fundamental Volcanic-Gas-Study Techniques: An Integrated Approach to Monitoring
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A. Jefferson Sutton, Kenneth A. McGee, Thomas J.Casadevall, and J. Barry Stokes,
Fundamental Volcanic-Gas-Study Techniques: An Integrated Approach to Monitoring:
IN: Ewert and Swanson, (eds.), 1992, Monitoring
Volcanoes: Techniques and Strategies Used by the Staff of the
Cascades Volcano Observatory, 1980-1990: USGS Bulletin 1966,
p.181-188.
Abstract
Fundamental gas-study methods for volcano monitoring include field sampling with
laboratory analysis, measurements of volcanic-plume emission rates, and
continuous on-site monitoring. Field sampling with laboratory analysis provides
detailed chemical information about a specific location for a specific time.
Gas-emission measurements reveal an average output commonly for SO2 and CO2.
Continuous monitoring provides an understanding of temporal changes in gas
concentrations. Each method has advantages and disadvantages, and a strong
gas-studies effort for monitoring purposes is synthesized using all three
approaches, along with conventional geophysical-monitoring methods.
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02/18/98, Lyn Topinka