Uncertainty area of the solar wind source region after clustering the MCT results for in situ point 10 of Event 1. The background is a zoom-in of the synoptic AIA 193 Å map that corresponds to this observation. (Left) The uncertainty area for the measured solar wind data is indicated with blue and the uncertainty area for the fixed solar wind values is indicated with red. (Right) The uncertainty area of both fast and measured solar wind combined is indicated with the hatched pattern ellipse, superimposed on our own uncertainty areas for each source, as shown in Fig. 9.