Selected plasma and magnetic field measurements for the back region of the ICME disturbance. The first panel shows the GSE-components of the magnetic field with same color-coding as in Fig. 8, and the absolute value of the magnetic field strength is plotted in black, with negative and positive sign. Again, the horizontal dashed line marks 0 nT. The second panel displays the proton density (black) and the plasma β (red). The third panel shows the proton speed. The fourth panel shows the PAD. Like in Fig. 8, the dashed blue line indicates the onset of the slow-mode wave. The magnetic field behaves similarly as in MCs.