These plots show data for individual nodes. The y-axis shows reachability (the probability a node is reached by a random walk starting from a random node). The x-axis is the conditional mean first-passage time (the average time it is reached given that it is reached). The time unit is seconds. The time of the animation represents a sweep over the hopping probability, linearly from 0.01 to 1. All values are averages over 10^9 walks. The names of the data sets refer to this paper.
Petter Holme 