Science Service System

Summary of Proposal GEO1634

TitleInSAR investigation of the crust deformations and city subsidence in the vicinity of Sofia district using TerraSAR-X data
Investigator ILIEVA, Maya - University of Architecture, Civil Engineering and Geodesy, Department of Geodesy and Geoinformatics
Team Member
Prof. Briole, Pierre - Ecole Normale Supérieure, Department of Geology
Dr. Mouratidis, Antonios - ESA/ESRIN, Directorate of Earth Observation Programmes
Mr Elias, Panagiotis - National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing
Prof. Dimitrov, Dimitar - National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sc, Department of Geodesy
SummaryThe region around the capital of Bulgaria – Sofia is in the periphery ofthe Aegean seismic zone, part of the Mediterranean seismic zone, and suffers fromintensive small to sporadic moderate seismicity. In local scale this zone is characterized with thejunction of a few fault structures in the so called Pancharevo node easterly fromthe main city. There are historicalevidences for significant shocks with magnitudes more than 6.0 in thesurroundings of Sofia city – in 1818 and 1858. The last remarkable earthquakeoccurred on 22nd of May 2012 at about 30 km westerly from the citycentre with magnitude 5.6 causing numerous damages residential and publicbuildings in the closest town Pernik, in the capital and several villages. Thisparticular area of the event had been seismically silent during the lastseveral centuries. The region has been studied by some of the team members since the 80s,after establishment of the Experimental Geodetic Network for monitoringof the recent crust movements and is regularly monitored by levelling, gravimetry,seismology and GPS. The target of thepresent proposal is to expand the investigation with InSAR data which willsupport the complex analysis of the geodynamic processes in the region bycombining the results from different geodetic techniques. The study will followseveral directions – detection of the crust deformation after the 2012 Pernik earthquake, determination of Sofia city subsidence, strain accumulation on theVitosha fault – the major fault structure in the southern part of the capital.

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