Variations of FAC intensities FAC_T (left column), FAC_D (middle column), and FAC_N (right column) with solar wind plasma, IMF, and solar wind-magnetosphere coupling functions V_p, P_sw, IMF B₀, Φ_D, and N_CF (from top to bottom panels). In each panel, black and red data correspond to the northern (NH) and southern (SH) hemispheric FACs, respectively. Pearson’s linear correlation coefficients (r) obtained from linear regression analyses are mentioned in each panel. The statistical significance of the correlation coefficients is confirmed by the Student’s t-test (Student. 1908).