How is the Earth deformed under the effect of continental drift, seismic phenomena or ice cap melt? At what speed is the sea level rising? How can we calculate the position of a constantly deformed point on the surface of the Earth? In order to continue getting the replies to these fundamental questions helping to understand our planet’s dynamics, the ITRF (International Terrestrial Reference Frame) must be updated. This reference frame is calculated by IGN once every four years on average and the new estimation, the ‘ITRF2014’, improves the accuracy of the reference and provides new data on seismic movement.