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Authors: Del Negro, C.* 
Currenti, G.* 
Solaro, G.* 
Greco, F.* 
Pepe, A.* 
Napoli, R.* 
Pepe, S.* 
Casu, F.* 
Sansosti, E.* 
Title: Capturing the fingerprint of Etna volcano activity in gravity and satellite radar data
Journal: Scientific Report 
Series/Report no.: /3 (2013)
Issue Date: 30-Oct-2013
DOI: 10.1038/srep03089
Keywords: Microgravity
Ground deformation
SAR Interferometry
Volcano monitoring
Etna volcano
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
Abstract: Long-term and high temporal resolution gravity and deformation data move us toward a better understanding of the behavior of Mt Etna during the June 1995 – December 2011 period in which the volcano exhibited magma charging phases, flank eruptions and summit crater activity. Monthly repeated gravity measurements were coupled with deformation time series using the Differential Synthetic Aperture Radar Interferometry (DInSAR) technique on two sequences of interferograms from ERS/ENVISAT and COSMO-SkyMed satellites. Combining spatiotemporal gravity and DInSAR observations provides the signature of three underlying processes at Etna: (i) magma accumulation in intermediate storage zones, (ii) magmatic intrusions at shallow depth in the South Rift area, and (iii) the seaward sliding of the volcano’s eastern flank. Here we demonstrate the strength of the complementary gravity and DInSAR analysis in discerning among different processes and, thus, in detecting deep magma uprising in months to years before the onset of a new Etna eruption.
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