Emission of gas and atmospheric dispersion of SO2 during the December 2013 eruption at San Miguel volcano (El Salvador, Central America)

D Granieri, G Salerno, M Liuzzo, A La Spina, G Giuffrida, T Caltabiano, G Giudice, E Gutierrez, F Montalvo, M R Burton, P Papale

    Research output: Contribution to journalArticlepeer-review

    Abstract

    San Miguel volcano, El Salvador, erupted on 29 December 2013, after a 46year period characterized by weak activity. Prior to the eruption a trend of increasing SO2 emission rate was observed, with all values measured after mid-November greater than the average value of the previous year (similar to 310td(-1)). During the eruption, SO2 emissions increased from the level of similar to 330td(-1) to 2200td(-1), dropping after the eruption to an average level of 680td(-1). Wind measurements and SO2 emission rates during the preeruptive, syneruptive, and posteruptive stages were used to model SO2 dispersion around the volcano. Atmospheric SO2 concentration exceeded the dangerous threshold of 5 ppm in the crater region and in some sectors with medium elevation of the highly visited volcanic cone. Combining the SO2 emission rate with measured CO2/SO2, HCl/SO2, and HF/SO2 plume gas ratios, we estimate the CO2, HCl, and HF outputs for the first time on this volcano.
    Original languageEnglish
    Pages (from-to)5847-5854
    Number of pages8
    JournalGeophysical Research Letters
    Volume42
    Issue number14
    DOIs
    Publication statusPublished - 2015

    Keywords

    • san miguel volcano
    • chaparrastique volcano
    • so2
    • chlorine
    • and fluorine discharges
    • simulated dispersion of so2
    • carbon-dioxide
    • numerical-model
    • co2
    • nicaragua
    • h2o

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