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http://hdl.handle.net/2122/16711| Authors: | Di Traglia, Federico* Bruno, Valentina* Casu, Francesco* Cocina, Ornella* De Luca, Claudio* Giudicepietro, Flora* Macedonio, Giovanni* Mattia, Mario* Monterroso, Fernando* Privitera, Eugenio* Lanari, Riccardo* |
Title: | Multi‐Temporal InSAR, GNSS and Seismic Measurements Reveal the Origin of the 2021 Vulcano Island (Italy) Unrest | Journal: | Geophysical Research Letters | Series/Report no.: | /50 (2023) | Publisher: | Wiley-Agu | Issue Date: | 23-Dec-2023 | DOI: | 10.1029/2023GL104952 | URL: | https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2023GL104952 | Keywords: | Vulcano Island InSAR GNSS P-SBAS Seismic activity Hydrothermal system Volcanic unrest Phreatic explosions |
Subject Classification: | 04.08. Volcanology | Abstract: | La Fossa Caldera at Vulcano (Italy) has been showing signs of unrest since September 2021. To investigate this phenomenon, we conducted an analysis of geodetic and seismological data from July to December 2021. In particular, we analyzed Multi Temporal Interferometric Synthetic Aperture Radar and Global Navigation Satellite System data, showing a pronounced elliptical uplift signal, which we elaborated using analytical source modeling. Additionally, seismic data were used to identify seismicity associated with hydrothermal system activity and assess its temporal evolution. The results indicate that the observed deformation is consistent with the expansion of the hydrothermal system within the La Fossa Caldera. These findings align with the analysis of seismic data, revealing signals indicative of hydrothermal activity, such as Very Long Period events. The results suggest that the ongoing phenomenon since 2021 represents a hydrothermal unrest, similar to the one observed during the late 1970s to early 1990s. | Description: | La Fossa Caldera at Vulcano Island, part of the Aeolian Islands archipelago in Italy, has shown an increased volcanic activity since September 2021. This activity is characterized by an increase in fumarole temperatures, massive gas emissions, as well as a marked uplift of the crater area, accompanied by an increase in seismicity. To investigate the nature of these phenomena, an analysis of ground deformation data obtained from Multi Temporal Interferometric Synthetic Aperture Radar and Global Navigation Satellite System measurements is presented. Additionally, a detailed analysis of data recorded by the seismic network on Vulcano Island has been conducted. The results indicate that these anomalies can be attributed to the expansion of the hydrothermal system, a phenomenon previously observed in the late 1970s and early 1990s. |
| Appears in Collections: | Article published / in press |
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| Di Traglia et al 2023 Multi‐Temporal InSAR GNSS and Seismic Measurements Reveal the Origin of Unrest Vulcano 2021 Geophysical Research Letters.pdf | Open Access Published file | 11.74 MB | Adobe PDF | View/Open |
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