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Showing 1 to 20 of 20 for “"Mt. Etna"”.
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Seismic site characterization using broadband and DAS ambient vibration measurements on Mt Etna, Italy
… structure at the Piano delle Concazze area on Mt Etna. Volcanic tremor records from an array of 26 broadband seismometers is processed and a strong variability of H/V ratios during periods of increased volcanic activity is found. From the spatial distribution of H/V peak frequencies, a geologic …
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Investigation on Mt. Etna dynamics by seismic and acoustic signals (August 2007-December 2010)
… the source-mechanism of acoustic events at Mt. Etna, infrasound signals-continuously recorded by Istituto Nazionale di Geofisica and Vulcanologia- were analyzed in this thesis, jointly with some seismic signals. In particular, we focused on the period comprised between August 2007 and …
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INSIGHTS INTO ERUPTION DYNAMICS AND SHALLOW PLUMBING SYSTEM OF MT. ETNA BY INFRASOUND AND SEISMIC SIGNALS
… system. In multi-vent volcanoes, such as Mt. Etna, where volcanic activity can rapidly vary over time and be simultaneously at the different craters, the shallow plumbing system is quite complex. For forecasting purposes, volcano monitoring measures many geophysical parameters and …
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Quantifying Crustal Assimilation in Historical to Recent (1329-2005) Lavas at Mt. Etna, Italy: Insights from Thermodynamic Modeling
The nearly continuous volcanic eruption record at Mt. Etna dating back approximately 700 years provides an excellent opportunity to investigate the geochemical evolution of a highly active volcano. Of particular interest is elucidating the cause of a selective enrichment in alkali elements (K, Rb, …
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Timing and Source of Alkali Enrichment at Mt. Etna, Sicily: Constraints from Clinopyroxene Geobarometry and In Situ SR Isotope Data
Since 1971, Mt. Etna, Europe’s largest and most active volcano, has exhibited increased eruption frequency and explosivity. Associated with this increased activity, researchers have documented higher abundances of alkali elements (K, Rb, Cs) as well as elevated <sup>87</sup>Sr/<sup>86</sup>Sr in …
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Segnali infrasonici e dinamica del magma al Mt. Etna: analisi acustica e multiparametrica per lo studio del sistema di alimentazione superficiale
… del sistema di alimentazione del Monte Etna, concentrandosi in particolare sul ruolo dei segnali infrasonici come strumento di interpretazione delle dinamiche interne e superficiali del vulcano. Infatti, l’infrasuono, grazie alla sua sensibilità alle variazioni della geometria dei …
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Multi-parametric study of the 2020-2022 paroxysmal activity at mt. Etna: the role of fluids in the trigger mechanisms, durations and energy of the eruptive phenomena [Studio multi-parametrico dell’attività parossistica del 2020-21 al Mt. Etna: ruolo dei fluidi sui meccanismi di innesco, durata ed energia dei fenomeni eruttivi]
La sequenza parossistica avvenuta sull'Etna tra dicembre 2020 e febbraio 2022 ha fornito importanti approfondimenti sull'evoluzione del sistema di alimentazione del vulcano e sui processi vulcanici sottostanti. È stata condotta un'ampia indagine petrologica e geofisica per comprendere meglio le …
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The Co-Volcanic Ionospheric Disturbances at Mt.Etna, Italy
… have been studied into regional scale at Mt. Etna (Italy). Leveraging a dense and proximal GNSS network around the volcano, co-volcanic ionospheric disturbances are observed during three largescale lava fountains that occurred on April 12th 2012, December 4th 2015 and July 4th 2024. The …
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MAGMA STORAGE, ASCENT AND DEGASSING HISTORIES TRACED BY TEXTURES AND CHEMICAL ZONING IN CRYSTALS: APPLICATION TO THE CO2-RICH BASALTIC SYSTEM OF MT. ETNA VOLCANO
… parossistica tra il 2011 e il 2013 al vulcano Etna, è stato utilizzato per definire le modalità e le scale temporali dei processi di residenza e trasferimento dei magmi in superficie. I cristalli di plagioclasio mostrano al nucleo e al bordo sia tessiture di equilibrio che di disequilibrio, …
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Experimental and Computational Approaches to Enhance the Gravimetric Monitoring of Volcanic Areas
… events. The preferred scenario for this study is Mt Etna not only because it is the most intensively monitored volcano in the world but also because there was the possibility to perform directly in the field gravity measurements, both discrete and continuous, with the instruments owned by the …
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Tassi di risalita vs. degassamento in sistemi vulcanici basici: quantificazione del parametro tempo come fattore primario di controllo dell’esplosività delle eruzioni
… lo studio delle inclusioni vetrose. Il vulcano Mt. Etna è stato scelto come caso studio, il quale rappresenta uno dei più attivi vulcani a condotto aperto nel mondo. Specificamente, 3 episodi eruttivi caratterizzati da differente esplosività sono stati selezionati dalla recente attività …
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Magmatic processes at basaltic volcanoes: insights from the crystal cargo
… selected eruptions: the 1669 eruption at Mt. Etna, and the 2007 Father's Day eruption at Kīlauea. A suite of diverse geochemical, petrological and petrographical observations, made at a range of length-scales, are combined and interpreted in tandem with geophysical monitoring data. The …
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Atmospheric water vapour tomography for DInSAR application and effect of volcanic plume on the microwaves
… weather conditions, the estimation of Mount Etna atmospheric anomalies using GPS measurements have noticeable importance to calibrate the SAR interferograms and to establish the effective ground deformation of the volcanic edifice. In this study we presented a method to obtain a 3D …
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Understanding emplacement of rapidly-emplaced volume-limited lava flows from Mount Etna’s 2011-2012 eruption : a multidisciplinary study
… flows of the 12 May and 19 July 2011 episodes at Mt. Etna which were within the range of values estimated by previous studies. Additionally, using FLOWGO to model flow thickness changes due to bifurcations of the primary flow produced average flow thickness estimates for the semichannelized 12 May …
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Characterisation of a chemiluminescence ozone monitor for volcanic applications
… plume emanating from a fumarole at the summit of Mt. Etna volcano, Italy with the CL monitor are compared to those of a conventional UV absorption monitor. In this first field study inside a fumarole, no significant interference with volcanic SO2 concentrations for the CL monitor was observed. …
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Volcanic Gas Studies by Multi Axis Differential Absorption Spectroscopy
… to distinguish the di®erent summit craters of Mt. Etna. No BrO was detected in proximity of the active vents of the volcanoes. An experimental study of the increase of the BrO/SO2 ratio with the aging plume was also conducted. ClO and OClO were measured in a volcanic plume for the first time. …
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UNRAVELLING VOLCANIC TREMOR SOURCE AT MOUNT ETNA FROM QUANTITATIVE MULTIPARAMETRIC ANALYSIS AND MOMENT TENSOR INVERSION
STUDIO DELLA SORGENTE DEL TREMORE VULCANICO AL MT. ETNA MEDIANTE ANALISI QUANTITATIVA MULTIPARAMETRICA ED INVERSIONE DEL TENSORE MOMENTO. Lo sviluppo di reti multiparametriche di monitoraggio, tecniche di analisi in tempo reale e l'acquisizione di dati ad alta risoluzione, hanno permesso di …
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Geochronology of terraced coastal deposits in Calabria and eastern Sicily: tectonic implications
… terraces outcropping in the area between Mt. Etna volcano and the Catania Plain, known as the Terreforti Hills , at the front of the Sicilian fold and thrust system, were analyzed. The obtained OSL ages were consistent with the normal evolutionary model of a terraced sequence, moving from …
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Characterization of active tectonic structures of the Etna volcano, through geophysical surveys, analysis of site response and deformation
In this thesis are shown the results of a multidisciplinary research, including geophysical, structural and geodetic surveys, carried out along the Tremestieri-Trecastagni-San Gregorio-Acitrezza fault system with the aim to provide additional insightful about its geometry and kinematics; also, …
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Development of reinforced alkali activated materials for cultural heritage restoration [Sviluppo di geopolimeri compositi rinforzati per il restauro di beni culturali]
Questa tesi di dottorato è stata redatta nell'ambito del corso di dottorato in Scienze della Terra e dell'Ambiente dell'Università di Catania e verte sullo sviluppo di materiali rinforzati ad attivazione alcalina (MAA) per il restauro dei beni culturali. La ricerca mira a esplorare la produzione …