Plot of polar motion determined from VLBI observations. In the graphic, the small crosses (dots) are the pole positions, determined by VLBI relative to the adopted international origin and based on the location of the pole in about 1900. The offset of the center of the VLBI track to the international origin represents the long-term drift of the pole. The red line is the path of the pole produced by the Bureau International de l'Heure using all available observations collected by various techniques.