The first section (a) shows a line of sight deformation map obtained from the descending ERS2 acquisitions of March and August 2000. (b) Shows the temporal evolution of the observed differential InSAR displacements, in the time interval June 1992-September 2000, for a point close to the location of the ACAE GPS permanent station. (c) Comparison of GPS measurements (ACAE site), projected along the radar line of sight and differential InSAR displacements in the time interval March-August 2000 (from Lanari et al., 2004).