%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Champenois, J.
%A Pinel, Virginie
%A Baize, S.
%A Audin, Laurence
%A Jomard, H.
%A Hooper, A.
%A Alvarado, A.
%A Yepes, H.
%T Large-scale inflation of Tungurahua volcano (Ecuador) revealed by Persistent Scatterers SAR interferometry
%D 2014
%L fdi:010062614
%G ENG
%J Geophysical Research Letters
%@ 0094-8276
%K Ecuador ; volcano ; Tungurahua ; InSAR ; deformation ; magma storage
%K EQUATEUR
%M ISI:000342755400018
%N 16
%P 5821-5828
%R 10.1002/2014gl060956
%U https://www.documentation.ird.fr/hor/fdi:010062614
%> https://www.documentation.ird.fr/intranet/publi/2014/11/010062614.pdf
%V 41
%W Horizon (IRD)
%X The Tungurahua volcano, in Ecuador, has been experiencing a substantial activity period since 1999, with several eruptions, including those of 2006 and 2008. We use a persistent scatterers approach to analyze a time series of Envisat synthetic aperture radar (SAR) data over the period 2003-2009, to investigate surface deformation in the region of the volcano. We measure a continuous large-scale uplift with a maximum line of sight displacement rate of about 8 mm/yr, which is the first evidence of a sustained inflation in the Andes for an active volcano encompassing several eruptions. We model this signal as magma emplacement in a permanent storage zone at 11.5 km below sea level, with a net inflow rate of 7 million m(3)/yr. The paroxysmal eruptions in 2006 and 2008 did not seem to disrupt this long-term signal. However, we observe significant deformation during the 2006 eruption consistent with an additional intrusion of 4.5 million m(3) of magma.
%$ 066 ; 126