Impact of the flare on the dynamics of the lower atmosphere. The left column shows results for the B₀ = 65 G simulation, while the right panels compare all four experiments. Shown are: (a) the total kinetic energy flux (assuming a the third-dimension depth of 100 Mm), (b) the maximum kinetic energy density directed downward, and (c) the maximum downward velocity, all shown at various heights near the photosphere. In the right column of panels we show: (d) the fraction of the lower atmospheric material that is chromospheric as functions of time for the different experiments, (e) the mass fluxes (assuming a third-dimension depth of 100 Mm), and (f) the maximum upward velocities of material, each taken at 5 Mm height.