A quantitative multitemporal analysis of the Sciara del Fuoco Slope (Stromboli Island)

Digital Elevation Models (DEMs) over large areas can be obtained by means of several geodetic and remote sensing techniques such as digital photogrammetry, laser scanning and SAR interferometry. The comparison of multitemporal DEMs is an useful tool for detecting, quantifying and mapping morphological variations occurring in active volcanic areas due to slope instability, deformation and lava flow emplacements. Also well shaped 3D features visible in a multitemporal dataset may be accurately measured and used to extract displacement vectors. A number of large scale photogrammetry surveys were recently performed before, during and after the 2002-2003 eruption at Stromboli Island to extract high resolution DEMs and orthophotos. Additional data were extracted by processing photogrammetric images acquired in the last decade. Main results of the multitemporal quantitative analysis of the collected data are presented and discussed in order to understand their contribution to lava flow evolution and volcano flank instability. Integration of the obtained with other remote sensing data, such us Lidar data, is experimented and discussed.