A new velocity field from the analysis of the Egyptian Permanent GPS Network (EPGN)
For studying recent crustal movements and their relation to earthquake occurrence in large scales, the National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt started in 2006 the establishment of the Egyptian Permanent GPS Network (EPGN). Beginning with 4 stations in 2007, 15 stations were operational at the end of 2011. In addition, a station in Alexandria of the French “Centre d'Études Alexandrines” (CEALX) was added as station to the EPGN. Nowadays, 16 stations are operational and an extension to 20 in the near future is expected. The collected EPGN data of the last 6 years are used in this work to throw light upon the present state of recent crustal movement of the whole of Egypt. Bernese software V. 5.0 was used for processing the collected data according to the IGS standards. In addition, selected IGS, AFREF, and EPN sites are processed for reference frame definition. In this first comprehensive analysis of the permanent network, a complete and consistent evaluation resulted in the first estimates of present day horizontal velocities and coordinate time series.
KeywordsEgypt Time series Permanent GPS Stochastic model
The authors would like to thank the staff member of the Crustal Movement Laboratory, Geodynamic Department, NRIAG for providing GPS data, special thank to Dr. Stefan Leinen from PSGD, TU-Darmstadt for his valuable help. Finally we thank the German Academic Exchange Service (DAAD) for the support of this work.
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