In situ measured components of the magnetic field taken by MESSENGER (black line), and simulation data in the eruption + stealth (red line) and double eruption (blue line) cases, propagated in the slow wind and taken at 75 R_⊙. The green highlighted area approximately delimits the observed ICME. The cyan and grey dashed lines indicate the separation between the two flux ropes in the simulated double eruption case, and observed data, respectively. The dates on the X axis are from the year 2009.