Top: three-component Maxwell distribution described by Equation (1), which shares the parameters of the best-fit three-component normal distribution (see Table C.1) of the observed v₁ sample. Bottom: cumulative distribution function (CDF) calculated from the threecomponent Maxwell distribution shown in the upper panel. The vertical dash-dotted line marks the mode of the three-component Maxwell distribution, while the dashed lines and the dotted line correspond to the 16th, the 84th, and the 50th percentile of the CDF, respectively.