Two components of ground magnetic perturbations, ΔB _n (panels a–c) and ΔB _e (panels d–f), at ground magnetometer stations THL, BJN, and DOB for event 8. The black line shows the observed perturbations, the cyan line shows the modelled total contribution to ground perturbations due to field aligned currents (FAC) and Pedersen currents and the magenta line is the contribution from the rest of the magnetospheric currents.