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Earth Crust Movements of the Territory of Bulgaria and North Greece from the Results of New GPS Data ProcessingNormal access

Authors: K. Vassileva and M. Atanasova
Event name: 8th Congress of the Balkan Geophysical Society
Session: Seismology & Lithosphere II
Publication date: 05 October 2015
DOI: 10.3997/2214-4609.201414233
Organisations: BGS, EAGE
Language: English
Info: Extended abstract, PDF ( 2.17Mb )
Price: € 20

The work presents a study of the earth crust movements for the territory of Bulgaria and north Greece on the base of new processing of GPS data from 36 GNSS permanent stations on the territory of study. One week data from each year are used from all four years 2011-2014. The estimated station coordinates and station velocity components in system ITRF2008 are transformed in the system ETRF2000 to be obtained the local movements of the stations as more representative of their behaviour. Combinations of the obtained relative velocity vectors of different stations are used for estimation of different relative Euler poles and rotations. Estimated Euler parameters are analyzed to be defined potential microplates of the study territory. The results confirm the motion of Moesia platform in direction and magnitude, determined by other researchers as well. A clear transition boundary between the Moesia platform and the southern Bulgaria zone is not found but it is found a counterclockwise rotation of the central-south part of the Maritsa zone. The behaviour of the stations of north-west and north-central Greece confirm the suggestion that they belongs to the Aegean extensional zone.

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