The February 2014 Cephalonia Earthquake (Greece): 3D Deformation Field and Source Modeling from Multiple SAR Techniques


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On Jan. 26, 2014 a magnitude 6.0 earthquake struck the island of Cephalonia, Greece, followed by a magnitude 5.9 event on Feb. 3, 2014, causing extensive structural damages and inducing widespread environmental effects. Following the first mainshock, acquisition of satellite imagery was planned from descending passes of the Italian Space Agency (ASI) COSMO-SkyMed satellites in the framework of the CEOS Disaster Risk Management Seismic Pilot and from ascending passes of the German Space Agency (DLR) TanDEM-X satellite. This enabled researchers at the Italian National Geophysics and Vulcanology Institute (INGV) and at the National Observatory of Athens (NOA) to measure the 3D permanent coseismic deformation field of the Feb. 3, 2014 event, by applying a combination of three processing techniques, namely Differential Synthetic Aperture Radar Interferometry (DInSAR), Intensity cross-correlation and Spectral Diversity (a.k.a. Multi Aperture Interferometry). 

The figure illustrates vertical (colour scale) and horizontal coseismic deformation (arrow field) associated to the Feb. 3 earthquake. Rectangles indicate the surface projection of the modeled fault planes with solid lines representing the intersection with topography. The star represents the relocated earthquake epicentre. More information at: http://srl.geoscienceworld.org/content/86/1/124.full.pdf+html