Following the start of a long term eruption in 1999, persistent scatterer InSAR between 2003 and 2009 showed large scale uplift centred on Tungurahua, with a peak rate of 8 mm/year (Chapenois et al., 2014). The deformation source was modelled as magma emplacement in a storage zone at 11.5 km depth at a rate of 7 million m³/year.
ALOS observations spanning an explosive phase in Feb. 2008 show uplift of the western flank of Tungurahua, with a maximum deformation of 17 cm (Biggs et al., 2010). The deformation is best modelled by a sill-like or ellispoidal magma body within the edifice inflating by 1.2 million m³.
Continuous GPS and Tilt monitoring is performed by IG-EPN and has been operational since 2010. Deformation results are available on the IG website: http://www.igepn.edu.ec/tungurahua/deformacion-tungurahua