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Authors: Palano, M.*
Puglisi, G.*
Gresta, S.*
Title: Ground deformation patterns at Mt. Etna from 1993 to 2000 from joint use of InSAR and GPS techniques
Title of journal: Journal of Volcanology and Geothermal Research
Series/Report no.: /169 (2008)
Publisher: Elsevier
Issue Date: 2008
DOI: 10.1016/j.jvolgeores.2007.08.014
Keywords: GPS
Ground deformations
Abstract: Combined GPS measurements and radar interferometry (InSAR) have been applied at Mt. Etna to study the ground deformation affecting the volcano both over the long (1993-2000) and short term (1997-2000) in order to better understand the dynamics of the volcano during the magma recharging phase following the 1991-93 eruption. Since 1993, InSAR and GPS data indicate that Mt. Etna has undergone an inflation. A deeper intrusion was detected by InSAR, on the western flank of the volcano, between March and May 1997. In the following months this intrusion rose up leading to a seismic swarm occurring in January 1998 in the western sector. The shallow intrusion is confirmed by GPS data. From 1998 to 2000, a general deflation affecting the upper part of the volcano was detected. Over the whole study period, a continuous eastward to south-eastward motion of the eastern sector of the volcano was also evidenced. The analytical inversions of GPS data inferred a plane dipping about 12°ESE, located beneath the eastern flank of the volcano at a depth of 1.5 km b.s.l.. The movement along this plane is able to reproduce the observed south-eastward motion of a sector bounded northward by the Pernicana fault, westward by the North-East Rift and the South Rift, and southward by the Mascalucia-Tremestieri-Trecastagni fault system. InSAR data have validated this model.
Appears in Collections:04.08.06. Volcano monitoring
Papers Published / Papers in press

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