Contour plots of the radial solar wind velocities in 3D space as modeled with a GONG magnetogram (date: 2011-06-20T23:54, CR2111). The range of the velocities shown in the figure is between [550,650] km s⁻¹. The HCS (B = 0) is depicted in gray, while the light blue sphere represents Earth. The sphere in the center of the figure represents the inner boundary (0.1 AU) and is color-coded based on the radial solar wind velocities at that radius, which are provided by the correspondent coronal model each time. (a) MULTI-VP+EUHFORIA. (b) WSA^*+EUHFORIA.