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http://hdl.handle.net/2122/12229
Authors: | Papageorgiou, Elena* Foumelis, Michael* Trasatti, Elisa* Ventura, Guido* Raucoules, Daniel* Mouratidis, Antonios* |
Title: | Multi-Sensor SAR Geodetic Imaging and Modelling of Santorini Volcano Post-Unrest Response | Journal: | Remote Sensing | Series/Report no.: | /11 (2019) | Issue Date: | Jan-2019 | DOI: | 10.3390/rs11030259 | Keywords: | remote sensing geodetic modelling santorini volcano unrest |
Subject Classification: | 04.08. Volcanology | Abstract: | Volcanic history of Santorini over recent years records a seismo-volcanic unrest in 2011–12 with a non-eruptive behavior. The volcano deformation state following the unrest was investigated through multi-sensor Synthetic Aperture Radar Interferometry (InSAR) time series. We focused on the analysis of Copernicus Sentinel-1, Radarsat-2 and TerraSAR-X Multi-temporal SAR Interferometric (MT-InSAR) results, for the post-unrest period 2012–17. Data from multiple Sentinel-1 tracks and acquisition geometries were used to constrain the E-W and vertical components of the deformation field along with their evolution in time. The interpretation of the InSAR observations and modelling provided insights on the post-unrest deformation pattern of the volcano, allowing the further re-evaluation of the unrest event. The increase of subsidence rates on Nea Kameni, in accordance with the observed change of the spatial deformation pattern, compared to the pre-unrest period, suggests the superimposition of various deformation sources. Best-fitting inversion results indicate two deflation sources located at southwestern Nea Kameni at 1 km depth, and in the northern intra-caldera area at 2 km depth. A northern sill-like source interprets the post-unrest deflation attributed to the passive degassing of the magma intruded at 4 km during the unrest, while an isotropic source at Nea Kameni simulates a prevailing subsidence occurring since the pre-unrest period (1992–2010). |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
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26_santo_RS_2019.pdf | open access paper | 6.16 MB | Adobe PDF | View/Open |
Supplementary Materials_Text 1.docx | supplementary material | 2.21 MB | Microsoft Word XML | View/Open |
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