ICME that occurred 24.09.1998. Predecrese level is marked by a dashed line in the CR count curve, defining the onset and the end point of FD. Along with the minimum of the CR count, these time points are used to obtain the recovery time (t_rec) and the duration of FD (t_FD = t_fall + t_rec), where t_fall is the time interval between the onset and the minimum and t_rec is the time interval between the minimum and the end point. Similarly, dashed lines given as the pre-increase and post-increase levels in magnetic field strength data are used to define the onset (entry into ICME) and the end point (exit from ICME), that give the decay (t_dec) and the duration (t_B = t_rise + t_dec) of the SW disturbance, t_rise and t_dec representing the time intervals between the onset and the maximum, and the maximum and the end point, respectively.