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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 | 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 | URL: | http://www.sciencedirect.com http://hdl.handle.net/2122/3138 |
Keywords: | GPS InSAR Etna Ground deformations Modelling |
Subject Classification: | 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring | 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. |
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2008 - Palano et al - [ETNA 1993-2000] - JVGR.pdf | Main articles | 4.32 MB | Adobe PDF |
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