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  3. 1(12), 2012
  4. Estimation of the strain rate tensor by GPS observations data in the Greece, Turkey and Iran regions

Estimation of the strain rate tensor by GPS observations data in the Greece, Turkey and Iran regions

JGD.
2012;
Volume 12, Number 1
: 5-10
https://doi.org/10.23939/jgd2012.01.005
Authors:
  1. Alexander N. Marchenko
  2. Kornyliy Tretyak
  3. N.P. Yarema
  4. B.B. Juman
1
Department of Geodesy, Institute of Geodesy, Lviv Polytechnic National University
2
Department of Higher Geodesy and Astronomy of Lviv Polytechnic National University
3
Lviv Polytechnic National University
4
Lviv Polytechnic National University

   Estimated from GPS observations velocities of GPS stations were used to obtain 2D model velocities and strain rate field in the Greece, the Turkey and Iran area. As a result, the study of the velocities field was done in the following steps. The first one consists of the development of the finite element approach on the geosphere based on bicubic spline functions for the interpolation scattered GPS data to the regular nodes because observations have irregular distribution. The second one represents the inversion of velocities from GPS observations to the strain rate tensor. We chose to apply such approach to observations in the Greece, the Turkey and Iran, because it is has not extensively instrumented areas and it is well understood from a geological and geophysical point of view. Finally full eigenvalue/eigenvector problem for the considered problem is preformed.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

geodynamics
the strain rate tensor
modern movements of the earth's crust
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