Updating of GNSS site coordinates in the region after 20.07.2017 the Bodrum-Kos earthquake

In this research, 8 periodically monitored benchmarks and 5 continuously operating GNSS stations, which were established in the region before the 21.07.2017 Bodrum-Kos earthquake, were used. In the study, the velocities of the points after the 21.07.2017 earthquake were determined and converted to ITRF-96 datum. The comparison of the coordinates before and after the earthquake was performed to determine the deformation occurred in the geodetic infrastructure. As a result, the earthquake caused deformation in the geodetic infrastructure, however; it has been observed that this deformation is not homogeneous. The deformation occurring in the geodetic infrastructure in the western part of the Bodrum peninsula is in harmony with the model produced in this study. Based on the study results, it has been observed that the deformation occurring in the east of the peninsula is out of the margin of error provided by the BÖHHBÜY. It has been evaluated that geodetic infrastructure renovation works can be carried out in these regions.