Tangential velocity distribution of the 37 SigMA clusters. Colors and labels are as in Fig. 10. Left: Observed tangential velocities along α and δ are strongly influenced by the Sun’s reflex motion, while stellar clusters at similar distances and with similar space motions are arranged in a loop-like pattern. Sources at l ∼ 0° are located in the lower-right part of the figure, and sources at l ∼ 290° in the upper-left part of the figure (see Fig. C.1). Right: Tangential velocities corrected for the Sun’s motion, and hence relative to the LSR. The correction reduces the projection effects of the observed tangential stellar motions. See the interactive 2D version online and Figs. E.1–E.5 for a better appreciation of the 2D kinematical properties of the clusters in Sco-Cen.