Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4083
AuthorsPuglisi, G.* 
Bonforte, A.* 
Ferretti, A.* 
Guglielmino, F.* 
Palano, M.* 
Prati, C.* 
TitleDynamics of Mt. Etna before, during and after the July - August 2001 eruption inferred from GPS and DInSAR data
Issue Date20-Jun-2008
Series/Report no./ 113 (2008)
DOI10.1029/2006JB004811
URIhttp://hdl.handle.net/2122/4083
KeywordsGround deformation
GPS
InSAR
Mt. Etna
Modelling
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
AbstractGround deformation data from GPS and differential synthetic aperture radar interferometry (DInSAR) techniques are analyzed to study the July–August 2001 Mount Etna eruption as well as the dynamics preceding and following this event. Five GPS surveys were carried out on the entire Mount Etna network or on its southeastern part, from July 2000 to October 2001. Five ERS-2 ascending passes and three descending ones are used to form five interferograms spanning periods from a month to 1 year, before and encompassing the eruption. Numerical and analytical inversions of the GPS and DInSAR data were performed to obtain analytical models for preeruptive, syneruptive and posteruptive periods. The deformation sources obtained were from the Mogi model: (1) pressure sources located beneath the upper western flank of the volcano, inflating before the eruption onset and deflating afterward; (2) tensile dislocations to model the intrusion of a N-S dike in the central part of the volcano; and (3) two sliding and two normal dislocations to model the eastern and southern flank dynamics. This study confirms that the lower vents of the eruption were fed by a magma stored at depth ranging from 9 to 4 km below sea level, as proposed from petrochemical and geophysical researches. The rising of the magma through the shallow crust started months before the eruption onset but accelerated on the last day; this study suggests that in the volcanic pile the path of the rising magma was driven by the volcano topography. The eastern sliding plane and the interaction between dike intrusion and flank instability have been better defined with respect to previous studies. The sliding motion abruptly accelerated with the dike intrusion, and this continued after the end of the eruption. The acceleration was accompanied by the propagation of the strain field toward the eastern periphery of the volcano.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
2008 - Puglisi et al - [ETNA 2001_ERUPTION] - JGR.pdfPubblication1.12 MBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

97
checked on Apr 27, 2017

Download(s)

30
checked on Apr 27, 2017

Google ScholarTM

Check

Altmetric