Bulletin Volcanologique

, Volume 39, Issue 4, pp 536–556 | Cite as

SO2 emission of the 1974 eruption of Volcán Fuego, Guatemala

  • T. C. Crafford


Volcán Fuego in the Central American Republic of Guatemala erupted violently in October, 1974. A remote sensing correlation spectrometer. COSPEC IV, which utilizes the characteristic molecular absorption of SO2 in the ultraviolet was used to monitor the SO2 content of the volcanic plume. Over a 60-day period measurements were made on 37 days between and following major eruptive phases. SO2 emission rates corrected for atmospheric scattering of the spectral signal average 423 metric tons/day with a standard deviation of 252 metric tons/days. Late stage peaks in SO2 emission at Fuego are consistent with the presence of anomalously high contents of soluble materials on the stratigraphically highest ashes from other Central American eruptions. Indications are that the SO2 concentration within the volcanic plume increased as activity waned. These features imply that remote spectroscopic sensing of SO2 and perhaps other gases in a volcanic plume may provide a relatively easy and inexpensive means of determining the cessation of violent eruptive activity.


Mass Flow Rate Soluble Material Stratospheric Aerosol Volcanic Plume Kilauea Volcano 
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Copyright information

© Stabilimento Tipografico Francesco Giannini & Figli 1975

Authors and Affiliations

  • T. C. Crafford
    • 1
  1. 1.Department of Earth SciencesDartmouth CollegeHanover

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