whole sky we found 706 of these seeds. Here we concentrate onto the area of the Scorpius-Centaurus OB-association (Sco-Cen) between Galactic longitude 280and 360and Galactic latitude from $-20$to + 30.

In Fig. \[SCOCEN\] we present the result of our search in the area of Sco-Cen. In the background we show the stars from @Hooge00 (US, UCL, LCC) by large gray squares. This serves as an indication of the extend of the Sco-Cen association. The seeds found by our search in TGAS are shown as black dots. Isolated seeds stand for small co-moving groups with not more than 6 stars in a 10-pc radius around the seed in TGAS. Spatial concentrations of seeds may suggest larger coherent groups. For instance, the concentration marked by the large cyan dot at $(l,b) = (344\deg,+4\deg)$ is the young compact moving group around V1062Sco at a distance of 175 pc. For comparison we also plot the centers of [the two]{} open clusters contained in MWSC up to 200 pc from the Sun (large red dots), as well as the groups found by @2017AJ....153..257O with more than 5 neighbors (violet diamonds). In parts, their and our findings are overlapping. We retrieved the open cluster IC 2391 