0000000000063833

AUTHOR

Pasquale Poggi

showing 3 related works from this author

Remote monitoring of building oscillation modes by means of real-time Mid Infrared Digital Holography

2016

AbstractNon-destructive measurements of deformations are a quite common application of holography but due to the intrinsic limits in the interferometric technique, those are generally confined only to small targets and in controlled environment. Here we present an advanced technique, based on Mid Infrared Digital Holography (MIR DH), which works in outdoor conditions and provides remote and real-time information on the oscillation modes of large engineering structures. Thanks to the long wavelength of the laser radiation, large areas of buildings can be simultaneously mapped with sub-micrometric resolution in terms of their amplitude and frequency oscillation modes providing all the modal p…

Synthetic aperture radarMultidisciplinaryComputer scienceOscillationbuilding oscillation modesAcousticsDigital HolographyHolographyDigital Holography; building oscillation modes02 engineering and technologyRadiation021001 nanoscience & nanotechnologyLaser01 natural sciencesArticleCharacterization (materials science)law.invention010309 opticsInterferometryAmplitudelaw0103 physical sciences0210 nano-technologyDigital holographySimulationScientific Reports
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Volcano seismicity and ground deformation unveil the gravity-driven magma discharge dynamics of a volcanic eruption.

2015

Effusive eruptions are explained as the mechanism by which volcanoes restore the equilibrium perturbed by magma rising in a chamber deep in the crust. Seismic, ground deformation and topographic measurements are compared with effusion rate during the 2007 Stromboli eruption, drawing an eruptive scenario that shifts our attention from the interior of the crust to the surface. The eruption is modelled as a gravity-driven drainage of magma stored in the volcanic edifice with a minor contribution of magma supplied at a steady rate from a deep reservoir. Here we show that the discharge rate can be predicted by the contraction of the volcano edifice and that the very-long-period seismicity migrat…

MultidisciplinaryVulcanian eruptionLateral eruptionLava discharge rateGeophysics; Ground deformation; Stromboli; SeismologyGeneral Physics and AstronomyGeneral ChemistryMagma chamberGeneral Biochemistry Genetics and Molecular BiologyPhreatic eruptionGeophysicsDense-rock equivalentEffusive eruption2007 STtromboli eruption; effusive eruption; Aeolian Islands; Mount-Etna; explosions; plume; mechanisms; network; system; periodGround deformationMagmaVolcano deformationCalderaStromboliPetrologySeismologyGeologyNature communications
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Tracking dynamics of magma migration in open-conduit systems

2016

Open-conduit volcanic systems are typically characterized by unsealed volcanic conduits feeding permanent or quasi-permanent volcanic activity. This persistent activity limits our ability to read changes in the monitored parameters, making the assessment of possible eruptive crises more difficult. We show how an integrated approach to monitoring can solve this problem, opening a new way to data interpretation. The increasing rate of explosive transients, tremor amplitude, thermal emissions of ejected tephra, and rise of the very-long-period (VLP) seismic source towards the surface are interpreted as indicating an upward migration of the magma column in response to an increased magma input r…

geographyConduit processes; Effusive eruption; Geophysical monitoring; Stromboli volcano; Geochemistry and Petrologygeography.geographical_feature_categoryLateral eruptionVulcanian eruption010504 meteorology & atmospheric sciencesConduit processesStromboli volcanoMagma chamberConduit processe010502 geochemistry & geophysics01 natural sciencesGeophysical monitoringEffusive eruptionEffusive eruptionDense-rock equivalentVolcanoGeochemistry and PetrologyMagmaTephraGeologySeismology0105 earth and related environmental sciences
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