[en] The statistical features of field-aligned currents include the following: (1) The large-scale regions of field-aligned currents determined previously persist during all phases of substorm activity. Namely, region 1 located near the poleward boundary of the field-aligned current region and region 2 located near the equatorward boundary. Field-aligned currents flow into region 1 on the morning side and away from region 1 on the evening side. The current flow in region 2 is reversed to region 1 at any given local time except in the Harang discontinuity region (-- 2000 - 2400 MLT) where the flow patterns are more complicated. (2) During active periods, the average latitude width of regions 1 and 2 increases by 20% to 30% and the centers of these regions shift equatorward by 2⁰ to 3⁰ with respect to the quiet time values. (3) The current density is statistically larger in region 1 than in region 2 at all local times except during active periods and in the midnight to morning local time sector. (4) During relatively quiet conditions, the largest field-aligned current densities occur in two areas of region 1 near noon (near -- 1030 MLT and -- 1300 MLT) with an average value of -- 1.6 μamp/m². During active periods, the regions of peak current density shift toward the nightside (the region near 1030 MLT shifts to --0730 MLT, and the region near 1300 MLT shifts to -- 1430 MLT) and the average current density increases to -- 2.2 μamp/m². (5) The average total amount of field-aligned current flowing into the ionosphere always equals the current flow away from the ionosphere during a wide range of quiet and disturbed conditions. (6) A three-region pattern of field-aligned current flow persists in the Harang discontinuity region (-- 2000 - 2400 MLT) during undisturbed and disturbed periods when the westward auroral electrojet does not intrude into this sector. (J.P.N.)