InSAR analysis of PALSAR ALOS data of Nisyros volcano (Aegean Sea, Greece)
Panagiotis Elias(1), Olga Sykioti(1), Dimitris Paronis(1) and Pierre Briole(2)
(1) National Observatory of Athens, I. Metaxa & Vas. Pavlou, GR-152 36, Greece
(2) Ecole Normale Supérieure, 24 Rue Lhomond, 75005 Paris, France
Nisyros is a volcanic island in the south-east of the Aegean volcanic arc. Over the period 1995–1998, the volcano exhibited intense seismic activity without eruption. Production and analysis of C-band (ERS/ESA) satellite radar interferograms (spanning period 1995–2000) by our team, showed continuous inflation from 1995 until May 1998 and deflation from mid-1998 to 2000, with the same deformation centre situated at the north-west part of the volcano . Point source modeling of the deformation field indicated the source of deformation to be located at five kilometers depth beneath the north-west edge of the island [Sykioti et al., 2003].
The first L-band images of Nisyros volcano are currently processed. This study aims at the (a) comparison of the quality of interferometric products issued by L-band with those previously issued by C-band and the additional/supplementary information provided, (b) investigation of the volcano’s deformation/activity for the period covered by ALOS data.
Sykioti O., Kontoes C., Elias P., Briole P., Sachpazi M., Paradisis D.,Kotsis I., «Ground Deformation at Nisyros Volcano (Greece) Detected by ERS2 SAR Differential Interferometry», Int. Journal of Remote Sensing,Vol. 24, No 1, pp. 183-188, 2003.