On the Assessment of Co-Seismic InSAR Images of Different Time Span Associated to Athens (Greece) 1999 Earthquake

摘要

A seismic event of magnitude M{sub}w=6,0 struck the broader area of Athens on September 7, 1999, causing considerable damages to building and loss of many human lifes. The present study focus on the assessment of different co-seismic interferometric images in terms of magnitude and pattern of deformation recorded, in relation to parameters that could limit the accuracy of the results, such as the baseline, the temporal and spatial decorrelation and the altitude of ambiguity. A total number of six interferograms were produced covering different time span periods. It was noticed that the measurement of deformation as well as its pattern are highly depended on the interferometric pair chosen for the analysis and especially on temporal and spatial decorrelation. Thus the production of multiple co-seismic interferograms in order to constrain any possible misinterpretation is of great importance.