Histograms of all measured EIT wave speeds v_EIT, the mean speeds , the initial speeds v_1,EIT, the final speeds v_last,EIT, the mean acceleration , and the power-law index δ_EIT, as derived from the catalog of Thompson & Myers (2009). The dotted vertical lines shows the mean values of the distributions, and N indicates the total number of individual values contained in each distribution. The dashed vertical lines indicate constant speeds with and δ_EIT = 1.