Imprint of the magnetic activity cycle on the asteroseismic characterisation of the Sun. Two different datasets, plotted in blue (n ≥ 12) and orange (n ≥ 16), were investigated. The black line shows the 10.7 cm radio emission flux, rescaled for illustration purposes. It serves as a proxy of the solar activity cycle. Upper panels: Temporal evolution of the asteroseismic age. Lower panels: Temporal evolution of the free parameters of the two surface effect prescriptions that were investigated. From left to right: Impact of magnetic activity based on BiSON observations and using the BG2 surface effect prescription, the GOLF observations and the BG2 prescription, and the GOLF observations and the K1 prescription.