Combining Radar , Optical and GPS data for Vrancea seismic area analysis

This paper addresses some key aspects regarding integrated use of radar, optical and GPS data over Vrancea seismic area in Romania in order to assess active tectonic of this region, since it has allowed the detection of active movements mainly coincident with active faults and/or with areas of seimicity concentration. Field studies should be oriented to the locations where seismic anomalies have been detected. Classifications of different geologic features and Digital Elevation Models (DEM) generation from SAR ERS 1/2, Landsat TM, ETM and ASTER data are highly correlated with in-situ ground data. GPS Romanian network stations data revealed a crustal displacement of about 5 or 6 millimeters per year in horizontal direction relative motion, and a few millimeter per year in vertical direction.