Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data
Post-emplacement dynamics of lava flows is governed by several factors such as poroelastic deformation of the substrate; gravity-induced repacking and rearrangement of the vesicle-bearing fluid lava and other void spaces by superposed flows; lava densification processes; viscoelastic strain relaxati...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-09-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1211450/full |
| _version_ | 1827815402203250688 |
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| author | Lisa Beccaro Matteo Albano Cristiano Tolomei Claudia Spinetti Giuseppe Pezzo Mimmo Palano Claudio Chiarabba |
| author_facet | Lisa Beccaro Matteo Albano Cristiano Tolomei Claudia Spinetti Giuseppe Pezzo Mimmo Palano Claudio Chiarabba |
| author_sort | Lisa Beccaro |
| collection | DOAJ |
| description | Post-emplacement dynamics of lava flows is governed by several factors such as poroelastic deformation of the substrate; gravity-induced repacking and rearrangement of the vesicle-bearing fluid lava and other void spaces by superposed flows; lava densification processes; viscoelastic strain relaxation of the ground caused by the lava load; thermal cooling and contraction of the solid lava; and discrete motion of surface blocks. Here we investigate post-emplacement lava flow dynamics at the Mt. Etna volcano, and we infer on the possible causes by exploiting optical and radar satellite data. Synthetic aperture radar data from Sentinel-1 satellite mission provided high-resolution horizontal and vertical displacement rates and displacement time series of the lava flows emplaced on the Mt. Etna volcano summit from January 2016 to July 2021. Sentinel-2 multispectral data allowed to identify the lava flows boundaries emplaced during the December 2018 and May 2019 paroxysms. Finally, high resolution COSMO-SkyMed radar data allowed to account for the topographic changes generated by the lava emplacement by means of stereo radargrammetry technique. Such an unprecedented dataset provided a full picture of the lava flow dynamics, whose kinematics is governed lava cooling, which in turn produce thermal contraction of the lava body and viscous compaction of the underlying substrate. Both phenomena act at different periods, being the thermal contraction predominant for recent lava flows. Downslope sliding is also invoked, especially for recent lava flows emplaced on high slope areas. |
| first_indexed | 2024-03-11T23:59:38Z |
| format | Article |
| id | doaj.art-f3e60222971847b5b45c8724afee76c4 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-11T23:59:38Z |
| publishDate | 2023-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-f3e60222971847b5b45c8724afee76c42023-09-18T05:37:01ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-09-011110.3389/feart.2023.12114501211450Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite dataLisa Beccaro0Matteo Albano1Cristiano Tolomei2Claudia Spinetti3Giuseppe Pezzo4Mimmo Palano5Claudio Chiarabba6Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Roma, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Roma, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Roma, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Roma, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Roma, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Catania, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Roma, ItalyPost-emplacement dynamics of lava flows is governed by several factors such as poroelastic deformation of the substrate; gravity-induced repacking and rearrangement of the vesicle-bearing fluid lava and other void spaces by superposed flows; lava densification processes; viscoelastic strain relaxation of the ground caused by the lava load; thermal cooling and contraction of the solid lava; and discrete motion of surface blocks. Here we investigate post-emplacement lava flow dynamics at the Mt. Etna volcano, and we infer on the possible causes by exploiting optical and radar satellite data. Synthetic aperture radar data from Sentinel-1 satellite mission provided high-resolution horizontal and vertical displacement rates and displacement time series of the lava flows emplaced on the Mt. Etna volcano summit from January 2016 to July 2021. Sentinel-2 multispectral data allowed to identify the lava flows boundaries emplaced during the December 2018 and May 2019 paroxysms. Finally, high resolution COSMO-SkyMed radar data allowed to account for the topographic changes generated by the lava emplacement by means of stereo radargrammetry technique. Such an unprecedented dataset provided a full picture of the lava flow dynamics, whose kinematics is governed lava cooling, which in turn produce thermal contraction of the lava body and viscous compaction of the underlying substrate. Both phenomena act at different periods, being the thermal contraction predominant for recent lava flows. Downslope sliding is also invoked, especially for recent lava flows emplaced on high slope areas.https://www.frontiersin.org/articles/10.3389/feart.2023.1211450/fullMt. Etna volcanoeruptionsremote sensingground displacementlava flowSAR data |
| spellingShingle | Lisa Beccaro Matteo Albano Cristiano Tolomei Claudia Spinetti Giuseppe Pezzo Mimmo Palano Claudio Chiarabba Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data Frontiers in Earth Science Mt. Etna volcano eruptions remote sensing ground displacement lava flow SAR data |
| title | Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data |
| title_full | Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data |
| title_fullStr | Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data |
| title_full_unstemmed | Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data |
| title_short | Insights into post-emplacement lava flow dynamics at Mt. Etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data |
| title_sort | insights into post emplacement lava flow dynamics at mt etna volcano from 2016 to 2021 by synthetic aperture radar and multispectral satellite data |
| topic | Mt. Etna volcano eruptions remote sensing ground displacement lava flow SAR data |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1211450/full |
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