Search results for " Strombolian activity"

showing 3 items of 3 documents

Strombolian eruptions and dynamics of magma degassing at Yasur Volcano (Vanuatu)

2020

Abstract Open vent basaltic volcanoes account for a substantial portion of the global atmospheric outgassing flux, largely through passive degassing and mild explosive activity. We present volcanic gas flux and composition data from Yasur Volcano, Vanuatu collected in July 2018. The average volcanic plume chemistry is characterised by a mean molar CO2/SO2 ratio of 2.14, H2O/SO2 of 148 and SO2/HCl of 1.02. The measured mean SO2 flux in the period of 6th to 9th July is 4.9 kg s−1. Therefore, the mean fluxes of the other species are 7.5 kg∙s−1 CO2, 208 kg∙s−1 H2O and 4.8 kg∙s−1 HCl. The degassing regime at Yasur volcano ranges from ‘passive’ to ‘active’ styles, with the latter including Stromb…

010504 meteorology & atmospheric sciencesBasaltic open vent volcanoessub-05Gas fluxes010502 geochemistry & geophysics01 natural sciencesStrombolian activityFlux (metallurgy)Geochemistry and PetrologyCrystal content in magmaPetrology0105 earth and related environmental sciencesBasaltgeographygeography.geographical_feature_categoryBasaltic open vent volcanoes Crystal content in magma Gas fluxes Magma fluxes Strombolian activity YasurStrombolian eruptionMagma fluxesOutgassingGeophysicsVolcanoVolcanic plumeMagmaInclusion (mineral)YasurGeology
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Dynamics of mild strombolian activity on Mt. Etna

2015

Abstract Here we report the first measurements of gas masses released during a rare period of strombolian activity at the Bocca Nuova crater, Mt. Etna, Sicily. UV camera data acquired for 195 events over an ≈ 27 minute period (27th July 2012) indicate erupted SO2 masses ranging from ≈ 0.1 to ≈ 14 kg per event, with corresponding total gas masses of ≈ 0.1 to 74 kg. Thus, the activity was characterised by more frequent and smaller events than typically associated with strombolian activity on volcanoes such as Stromboli. Events releasing larger measured gas masses were followed by relatively long repose periods before the following burst, a feature not previously reported on from gas measureme…

Coalescence (physics)Ultra-violet imaginggeographygeography.geographical_feature_categoryTrailing wake interactionCoalescence; Mild strombolian activity; Slug dynamics; Trailing wake interaction; Ultra-violet imaging; Volcanic gas measurements; Geochemistry and Petrology; GeophysicsVolcanic explosivity indexCoalescenceVolcanic gas measurementsCoalescence; Mild strombolian activity; Slug dynamics; Trailing wake interaction; Ultra-violet imaging; Volcanic gas measurements; Geophysics; Geochemistry and PetrologyStrombolian eruptionSlug dynamicsGeophysicsVolcanoImpact craterGeochemistry and PetrologyGas slugMild formGeologySeismologyMild strombolian activity
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Frequency Based Detection and Monitoring of Small Scale Explosive Activity by Comparing Satellite and Ground Based Infrared Observations at Stromboli…

2014

Abstract Thermal activity is a common precursor to explosive volcanic activity. The ability to use these thermal precursors to monitor the volcano and obtain early warning about upcoming activity is beneficial for both human safety and infrastructure security. By using a very reliably active volcano, Stromboli Volcano in Italy, a method has been developed and tested to look at changes in the frequency of small scale explosive activity and how this activity changes prior to larger, ash producing explosive events. Thermal camera footage was used to designate parameters for typical explosions at Stromboli (size of spatter field, cooling rate, frequency of explosions) and this information was a…

geographygeography.geographical_feature_categoryExplosive materialInfrasoundInstrumentationAdvanced Spaceborne Thermal Emission and Reflection RadiometerGeophysicsVolcanoGeochemistry and PetrologySatelliteSatellite imageryModerate-resolution imaging spectroradiometerRemote Sensing Strombolian activitySeismologyGeologyRemote sensing
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