Case of spine-fan reconnection driven by a single pulse. Top panel: maximum displacement of the null point from its initial position plotted in a linear-log plot against η. Diamonds: v₀ = 0.01, asterisks: v₀ = 0.02. Solid lines depict the line of best fit in each case. Bottom panel: maximum displacement of the null point plotted against v₀ where η = 5 × 10^-4. Note the null stays in the z = 0 plane by symmetry.