Top left panel: K_s vs. (J − K_s) CMD for a 10 × 10 arcmin² region in tile b249 for VVV stellar sources matched with 2MASS. The CMD is centred in the region of the bulge red clump (red) and the disk main sequence (blue). Top right panel: histogram of the longitudinal proper motion for both selected regions in the CMD. The mean values for Δα × cosδ and Δδ are shown in the top left corner. Bottom left panel: same as top right panel for the latitudinal proper motion distribution. Bottom right panel: the μ_b vs. μ_l distribution in units of mas yr^-1.