ICME-CIR event that occurred on 12 October 2000. A two-step FD is caused by a shock-related ICME. However, the increased speed after the ICME is due to CIR, which is confirmed by the proton density and temperature data (not shown). Dashed vertical line marks the shock, which is practically simultaneous with the FD onset. The method of estimating the relative maximal and minimal amplitude (MAX and MIN, respectively) and duration (t_FD and t_B) is sketched for FD and solar wind disturbance.