Top left: acceleration as a function of time due to the gravity force (dash-dotted red line), gas pressure gradient force (triple-dot-dashed green line), magnetic pressure gradient force (solid black line), and magnetic tension force (dashed black line). The values are integrated over the big drop from Fig. 8 (AD run) after it forms at about 70 s of the simulation time. Bottom left: acceleration due to the sum of all above forces. Top right: vertical velocity of the big drop. Vertical dotted lines indicate time instants of zero velocity. Bottom right: effective cutoff wavelength calculated from Eq. (1) for the horizontal field component Bcos(θ) at the bottom of the drop. Horizontal dotted lines indicate the size of the computational domain L = 250 km.