Average of the PVI peak values related to the human-verified reconnection events (i.e., average of the PVI local maxima collected at each crossing of reconnection regions) for each lag Δs (blue squares). The ±1σ interval (blue vertical bars), the maximum values (upright black triangles), and the minimum values (upside-down black triangles) are also reported. Horizontal dashed lines are the thresholds used for Figs. 4–5. To compare PVI peak values from different trajectories, the standardized PVI (ℐ − μ(ℐ))/σ(ℐ) is reported (where μ(ℐ) = ⟨ℐ⟩). Top panel is for t = 247 and the bottom panel for t = 494.