Time evolution of normalized vertical magnetic field profiles, a) together with B_eq(z)/B₀ (shown by blue line), b); as well as c) and d) , from a MFS for Run Bv05/33 with B₀/B_eq0 = 0.05 at t/τ_td = 2.9 (dashed), 3 (dotted), 3.1 (dash-dotted), 3.3, 3.7, 4.2., 5, and 50 (thick solid line). The blue solid lines indicate B_eq(z), normalized by a) B₀ and b) by itself (corresponding thus to unity). The red lines indicate the locations z_B and , as well as relevant intersections with normalized values of and B_eq.