Magnetic field magnitude and magnetic field components in RTN coordinates at each spacecraft. The observational data are plotted in black, and the two CME models propagated in the steady solar wind, namely a cone and a spheromak CME model, are represented by the red and purple curves, respectively. The blue and pink shaded areas correspond to the sheath and magnetic ejecta regions, as defined by in situ observations. The vertical blue line shows the arrival of the shock, the vertical green line corresponds to the end of the magnetic cloud of the CME, the magenta line corresponds to the end of the second magnetic cloud, and the vertical orange line shows the end of a part of the solar wind following the CME.