0000000000653382

AUTHOR

H. Wehrmann

showing 2 related works from this author

Turmoil at Turrialba Volcano (Costa Rica): Degassing and eruptive processes inferred from high-frequency gas monitoring

2016

Eruptive activity at Turrialba Volcano (Costa Rica) has escalated significantly since 2014, causing airport and school closures in the capital city of San Jose. Whether or not new magma is involved in the current unrest seems probable but remains a matter of debate as ash deposits are dominated by hydrothermal material. Here we use high-frequency gas monitoring to track the behavior of the volcano between 2014 and 2015 and to decipher magmatic versus hydrothermal contributions to the eruptions. Pulses of deeply derived CO2-rich gas (CO2/S-total>4.5) precede explosive activity, providing a clear precursor to eruptive periods that occurs up to 2weeks before eruptions, which are accompanied by…

geographygeography.geographical_feature_category010504 meteorology & atmospheric sciencesEarth scienceGeochemistryGas emissions010502 geochemistry & geophysics01 natural sciencesHydrothermal circulationGas monitoringMagmatic waterGeophysicsVolcano13. Climate actionSpace and Planetary ScienceGeochemistry and PetrologyCapital cityEarth and Planetary Sciences (miscellaneous)Phreatomagmatic eruptionPhreaticGeology0105 earth and related environmental sciencesJournal of Geophysical Research: Solid Earth
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Turmoil at Turrialba Volcano (Costa Rica): Degassing and eruptive processes inferred from high-frequency gas monitoring

2016

OVSICORI Eruptive activity at Turrialba Volcano (Costa Rica) has escalated significantly since 2014, causing airport and school closures in the capital city of San José. Whether or not new magma is involved in the current unrest seems probable but remains a matter of debate as ash deposits are dominated by hydrothermal material. Here we use high‐frequency gas monitoring to track the behavior of the volcano between 2014 and 2015 and to decipher magmatic versus hydrothermal contributions to the eruptions. Pulses of deeply derived CO2‐rich gas (CO2/Stotal > 4.5) precede explosive activity, providing a clear precursor to eruptive periods that occurs up to 2 weeks before eruptions, which are acc…

Volcanic gaseVolcano monitoringAtmospheric Scienceexplosive eruptionVOLCAN TURRIALBA (COSTA RICA)Soil ScienceSULFURAquatic ScienceOceanographyphreatomagmatic eruptionVOLCANIC ERUPTIONSHydrothermal systemGeochemistry and PetrologyEarth and Planetary Sciences (miscellaneous)MAGMAphreatic eruptionAZUFRECOSTA RICAERUPCIONES VOLCÁNICASVOLCANIC ASHGeophysicWater Science and TechnologyCENIZA VOLCÁNICAPhreatomagmatic eruptionEcologyhydrothermal systemvolcano monitoringExplosive eruptionPaleontologyForestryTURRIALBA VOLCANO (COSTA RICA)volcanic gasesSpace and Planetary ScienceEarth-Surface ProcessePhreatic eruption
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