Dependence of the MPB parameters r₀ (square in panel a), α₀ (circle in panel b), α₁ (gradient in panel c), and α₂ (delta in panel d) on the intensities of the IMF components B_X (red), B_Y (blue), and B_Z (green) for P_d = 1.06 nPa (n = 4.0 cm⁻³, V_X = −400.0 km s⁻¹). The IMF conditions were set with one component having a nonzero value, while the two other components were null. The line segments connect adjacent points. Further details concerning the case information are listed as cases 65–94 in the supplementary document.