Deformation map for the Phlegrean Fields (Campi Flegrei) area obtained by using Envisat radar data. Ascending images (24) from February 2003 to April 2006 were employed to estimate the ground deformation map and time series. The deformation velocity was computed on the last 12 acquisitions, starting from January 2005 and shows an area of maximum deformation (exceeding 2 cm/year) localised in the centre of the Pozzuoli town, mainly in the harbour and surrounding zones (box A). The deformation also extends westward to the area surrounding Monte Nuovo (box B). The colours span from green (stable points) to red (maximum deformation upwards).