Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/3132
Authors: | Palano, M.* Puglisi, G.* Gresta, S.* |
Title: | Ground deformation at Mt. Etna: a joint interpretation of GPS and InSAR data from 1993 to 2000 | Journal: | Bollettino di Geofisica Teorica ed Applicata | Series/Report no.: | 2/48(2007) | Publisher: | OGS | Issue Date: | Jun-2007 | URL: | http://hdl.handle.net/2122/2623 | Keywords: | Etna GPS InSAR ground deformations modelling |
Subject Classification: | 04. Solid Earth::04.03. Geodesy::04.03.07. Satellite geodesy 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 (1997-1998 and 1998-2000). The aim was 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 deep 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. This now 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 1.4 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: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
2007 - Palano et al - [ETNA 1993-2000] - BGTA.pdf | Main article | 6.22 MB | Adobe PDF |
Page view(s)
157
checked on Mar 27, 2024
Download(s)
23
checked on Mar 27, 2024