Scanning tomography of SO(2) distribution in a volcanic gas plume

T E Wright, M Burton, D M Pyle, T Caltabiano

    Research output: Contribution to journalArticlepeer-review


    Two-dimensional cross sections of the sulphur dioxide (SO(2)) distribution in the volcanic gas plume of Mt. Etna were reconstructed using tomographic techniques. The data for these projections were generated by a network of five automated scanning spectrometers, positioned on the flanks of the volcano. These measure slant-column amounts of SO(2) at 105 different angles, every four minutes. Stable wind conditions allow the plume to be monitored on 82% of days. A time-series of plume cross sections was computed, revealing the potential of this method to track variations in plume position and structure on timescales of minutes to hours, a result of potential importance for air traffic and civil defence in case of eruption, when copious amounts of fine ash can be transported.
    Original languageEnglish
    JournalGeophysical Research Letters
    Issue number17
    Publication statusPublished - 2008


    • soufriere hills volcano
    • mount etna
    • emissions
    • reconstruction
    • algorithm
    • flux


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