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Short-period volcanic gas precursors to phreatic eruptions: Insights from Poás Volcano, Costa Rica

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de Moor, J.M., Aiuppa, A., Pacheco, J., Avard, G., Kern, C., Liuzzo, M., Martínez, M., Giudice, G., and Fischer, T.P., 2016, Short-period volcanic gas precursors to phreatic eruptions; insights from Poás Volcano, Costa Rica: Earth and Planetary Science Letters, v. 442. p. 218-227, doi:10.1016/j.epsl.2016.02.056.

Summary

Volcanic eruptions involving interaction with water are amongst the most violent and unpredictable geologic phenomena on Earth. Phreatic eruptions are exceptionally difficult to forecast by traditional geophysical techniques. Here we report on short-term precursory variations in gas emissions related to phreatic blasts at Poás volcano, Costa Rica, as measured with an in situ multiple gas analyzer that was deployed at the edge of the erupting lake. Gas emitted from this hyper-acid crater lake approaches magmatic values of SO2/CO2 1–6 days prior to eruption. The SO2 flux derived from magmatic degassing through the lake is measureable by differential optical absorption spectrometry (sporadic campaign measurements), which allows us to [...]

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Type Scheme Key
local-index unknown 70175484
local-pk unknown 70175484
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1016/j.epsl.2016.02.056
series unknown Earth and Planetary Science Letters

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citationTypeArticle
journalEarth and Planetary Science Letters
languageEnglish
parts
typevolume
value442

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