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Integrated satellite, GPS and geophysical data for seismic hazard assessment in Vrancea area, Romania

Maria Zoran(1)

(1) National Institute of RD for Optoelectronics, Atomistilor Street 1, MG5 Bucharest Magurele 077125, Romania


The seismogenic Romanian Vrancea zone is situated beneath continental crust, at the SE corner of the highly arcuate Carpathian arc, having peculiar features of strong earthquakes (3 earthquakes/century with Mw > 7.2 and 6 events/century with Mw > 6.8) occurring at intermediate depths in a very narrow source volume. The fault plane solutions of the instrumentally recorded large earthquakes are remarkably similar. Understanding of Vrancea tectonics is mandatory for improving hazard assessment in this area. This paper addresses some key aspects of the crustal deformation analysis using information from different satellite data (SAR ERS1/2, IKONOS, ASTER )in synergy with GPS data provided by Romanian and European GPS network as well as geophysical field.Based on this information and Digital Elevation Models was revealed a crustal displacement of about 5-6 millimeters/ year in horizontal direction relative motion, and a few millimeters/year in vertical direction. Information Technology (GIS, Remote Sensing, satellite data.etc) can help to understand crustal dynamics and associated deformation as well as in planning and implementation of hazards reduction measures .


Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry