Dominant direction of dimming expansion at the end of impulsive phase for 1 October, 2011. Top: Dimming area in different sectors (shown in the bottom panels), showing its maximum at sector 6. Bottom: Cumulative dimming pixel mask outlined by gray with red contours. The blue lines indicate the 12 sectors. The dashed purple line indicates the sector of dominant dimming development. The black dots show the dimming edges (one of them being the source) in the sector of dominant dimming which are used to generate the CME cones at different heights, associated widths and inclination angles.