Data fusion technique for analysis of Vrancea seismic region, Romania

摘要

To emphasize geomorphological features for detection of faulting zones responsible of seismic events generation , this paper present the results of LANDSAT TM and SAR- ERS satellite data application for Vrancea (Romania ) seismic area by data fusion technique. Remote sensing and field studies of active faults provide a geologic history that better than instrumental and historic records. Vrancea area ,the most risky seismic in Europe, is bounded by latitudes 45.6°N and 46.0 °N and longitudes 26.5 °E and 27.5°E being crossed by principal and secondary faults. All data information available on the study area have been integrated in a unique database of geologic maps, thematic maps, land use maps. For lineament maps generation both for Landsat TM and SAR ERS-1 images it was applied filtering technique and histogram equalization methods for more enhancement and better interpretability of discrete linear features. Satellite data are very suited for recognizing the continuity and regional relationships of faults .Landsat TM images show shorter and denser distributed linear features, while ERS1-SAR images are dominated by the principal structures which in certain cases they complete lineament patterns from Landsat data. The combination of filtering techniques and image fusion is essential for neotectonic applications and lineament analysis.