Figure 2
From: Leader-chasing behavior in negative artificial triggered lightning flashes
Propagation speeds of leaders in Case I. (a) The speed-position figure of the chased leader I. (b) The speed-position figures of the chasing leader I and the united leader I. (c) The propagation speeds variation of the chased leader I, the chasing leader I, and the united leader I, with two dart leaders as counterparts.
