Distribution of the IVA events along the radial distance (A); the longitudinal separation from the flare (B); the θ_Bn of the shock (C); and the speed of the shock when it passes PSP and the speed of CME (D). The left subpanels display the distribution in the order of time, and the right subpanels present histograms of the distribution. The blue stars and histogram represent results for all 14 cases, while the orange ones are for events with shocks measured locally at PSP. The vertical dashed and the dotted lines indicate the corresponding mean and median values in the given panels. Specifically, the red stars and histogram in panel (D) indicate the speed of local shock that arrived at PSP, and the mean and median speeds are presented as vertical red lines. To maintain figure clarity, the histogram of CME speeds associated with local shocks is omitted, and only the averaged value is shown in the figure. The green circles in each panel indicate the nose-only events.