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Authors: Bonaccorso, A.* 
Bonforte, A.* 
Gambino, S.* 
Title: Twenty-five years of continuous borehole tilt and vertical displacement data at Mount Etna: Insights on long-term volcanic dynamics
Issue Date: 2015
Series/Report no.: 23/42 (2015)
DOI: 10.1002/2015GL066517
Keywords: tilt
Subject Classification04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations 
Abstract: We report a 25 year-long data set (1990–2014) of combined continuous tilt and GPS vertical displacement series recorded at Etna volcano. To our knowledge, this is the first time that such a data set on an active volcano has been presented. We show the coherence of the two series, which help draw new insights on how the volcano, characterized by frequent flank eruptions, works in the long-term (tens of years). This data set provides evidence that after the 1992–1993 flank eruption (the biggest in the last three centuries) and the following major recharging phase (1994–2001), all the ensuing eruptions fall within a single long-term reequilibrium phase (2001–2014).
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