TFG detected from the Vz component at z = 0 Mm with superimposed downflows (white) at different depths below the surface as follows: 3.0 Mm (top left panel), 5.0 Mm (top right), 8.0 Mm (bottom left panel), and 15 Mm (bottom right panel). movie4.mp4, movie5.mp4, movie6.mp4, and movie7.mp4 show the evolution of the families at the surface (z = 0) and the downflow (white) at different depths of 3.0, 5.0, 8.0, and 15.0 Mm below the surface, respectively. Time step is 60 s; FOV 131″ × 131″.