DInSAR Analysis and Analytical Modeling of Mount Etna Displacements: The December 2018 Volcano‐Tectonic Crisis

We investigate the 24–27 December 2018 eruption of Mount Etna occurred from fissures located on the volcano eastern flank and accompanied by a seismic swarm, which was triggered by the magma intrusion and continued for weeks after the end of the eruption. Moreover, this swarm involved some of the sh...

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Bibliographic Details
Published in:Geophysical research letters Vol. 46; no. 11; pp. 5817 - 5827
Main Authors: De Novellis, V., Atzori, S., De Luca, C., Manzo, M., Valerio, E., Bonano, M., Cardaci, C., Castaldo, R., Di Bucci, D., Manunta, M., Onorato, G., Pepe, S., Solaro, G., Tizzani, P., Zinno, I., Neri, M., Lanari, R., Casu, F.
Format: Journal Article
Language:English
Published: Washington John Wiley & Sons, Inc 16.06.2019
Subjects:
2018 Mount Etna eruption
3‐D source geometry
analytical modeling
Cracks
Deformation
dikes intrusion
DInSAR measurements
earthquake
Eruptions
Interferometric synthetic aperture radar
Intrusion
Lava
Magma
Modelling
SAR (radar)
Seismological data
Seismology
Synthetic aperture radar
Tectonics
Volcanic eruptions
Volcanoes
Mount Etna
ISSN:0094-8276, 1944-8007
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Summary:We investigate the 24–27 December 2018 eruption of Mount Etna occurred from fissures located on the volcano eastern flank and accompanied by a seismic swarm, which was triggered by the magma intrusion and continued for weeks after the end of the eruption. Moreover, this swarm involved some of the shallow volcano‐tectonic structures located on the Mount Etna flanks and culminated on 26 December with the strongest event (ML 4.8), occurred along the Fiandaca Fault. In this work, we analyze seismological data and Sentinel‐1 Differential Interferometric Synthetic Aperture Radar (DInSAR) measurements, the latter inverted through analytical modeling. Our results suggest that a dike source intruded, promoting the opening of the eruptive fissures fed by a shallower dike. Moreover, our findings indicate that the activation of faults in different sectors of the volcano may be considered as a response to accommodate the deformations induced by the magma volumes injection. Key Points We investigate the ground displacements and the 3D source geometry of the December 2018 Mount Etna (Italy) volcano‐tectonic crisis DInSAR data obtained from SAR data pairs collected by Sentinel‐1 have been inverted through analytical modeling Our results suggest the presence of two volcanic sources: a shallow dike and a deeper one associated with a long‐term seismic swarm
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ISSN:0094-8276
1944-8007
DOI:10.1029/2019GL082467