Light curves of PKS 1502 + 106. From top to bottom we show the monthly binned Fermi/LAT γ-ray light curve at energies E> 100 MeV; F-GAMMA single-dish radio light curve at 86 GHz with the core and component light curves from the VLBI flux density decomposition; same as before, but at 43 GHz and (lower panel) at 15 GHz. The VLBI knot C3 is only visible at the two highest frequencies, at its decaying flux density phase. The grey shaded area delineates the full duration of the flare ~650 days. The red shaded area shows the estimated ejection interval of knot C3 with the red solid line designating its t_ej.