a) Evolution of the density/velocity map for the four times labelled 1−4 in Fig. 15. b) The three first columns represent the relative importance of each component of the magnetic field. The colour scale shows the value of each component as follows: black for high values (≳ 1), white for low values (≲ 10^-1.5); blue and red (in-between ≳ 10^-1). The rightmost column displays the plasma parameter β = P/P_mag. Snapshots for different times of interest in the iMHD μ = 5 aligned case, as labelled Fig. 15.