O+ and O2+ density maps for two different winds and three different magnetic field configurations. The density maps (color) are presented as function of distance along surface (x-axis) and altitude (y-axis). Left y-title indicates which wind profile and which time are plotted. Time 0 h 0 min (panels a to d) represent a static magnetic field with only draped magnetic field present. Times 10 h 50 min and 21 h 45 min (panels e to l) are associated with the times given in Fig. 5 and explained in Section 3. In the right column the location of the crustal fields are indicated by the black contour lines.