TITLE:
InSAR Observation for the Surface Displacements at Mt. Etna between 2003 and 2007
AUTHORS:
Syeda Sabikun Nahar, Arif Mahmud
KEYWORDS:
InSAR, Interferogram, Ratemap, Eruptions, Magma and π-Rate
JOURNAL NAME:
International Journal of Geosciences,
Vol.6 No.2,
February
11,
2015
ABSTRACT: This research is mainly
devoted to InSAR observations using Poly-Interferogram Rate and Time-series
Estimator (π-rate) software to investigate continuous surface displacement at
Mt. Etna (Sicily), Italy between 2003 and 2007. Using ascending and descending
SAR images produced by European Space Agency’s ENVISAT, we generate a set of
interferograms which are used to determinethe
deformation history of Etna from 2003 to 2007. Using (π-rate), we can generate
the InSARtime-series and ratemap
while minimizing errors induced by the satellites orbit and atmosphericphase delays. During the period of
2003-2007, three separate eruptions were observed. In order to explain the
deformation, we solve three displacement rate for 2003-2005, 2006 and 2007. As
expected, the result suggests that displacement rates are not constant with
respect to time. During 2006 the volcano appeared to switch from a period of
deflation to a period of inflation. These results highlight the importance of
InSAR for generating deformation time-series around Mt.Etna, and with the application of
numerical models these results can be used to estimate theamount of magma moving in the
subsurface.