Identification of the CME boundaries in EUHFORIA time series at various heliocentric distances. At each heliocentric distance, the proton, β_p, magnetic field intensity, B, speed, v, and proton number density, n_p, are provided. In all panels, the arrival time of the CME-driven shock is marked by the dashed blue line. Top panel: the boundaries of the magnetic ejecta identified by imposing different β_p thresholds are marked by coloured vertical lines, while the ultimate boundaries of the magnetic ejecta obtained by applying the threshold condition β_p ≤ 0.5 are marked as continuous blue lines in the second, third, and fourth panels.