Predicted density and velocity profiles as function of time for numerical models with different input parameters (expelled mass m, duration Δt, and ejection velocity V) of the CME. The models are performed varying only one parameter, and the others are fixed. Orange profiles (top panels) are obtained from variations of m; blue profiles (middle panels) correspond to different values of Δt; and green profiles (bottom panels) are calculated changing v. The color bars at the right side show the variation of each parameter, and the black lines correspond to the predicted profiles of the reference model with m = 1.1 × 10¹⁶ g, Δt = 2.0 h, and v = 1330 km s⁻¹). See the text for further description.