Application of the DIRECD method to relate the expansion of coronal dimming to the early CME propagation for June event. (a) Best fit cone outlined by magenta boundaries. The best-fit green cone has a height of 0.89 Rsun, a width of 81°, and inclination angle of 15.7°. The green dots indicate the orthogonal projections of the CME cone onto the solar surface. We require an edge of the cone base to be orthogonally projected to points A and B to match the dimming extent. (b) Dimming detection: 195Å EUVI/STEREO-A base-difference image together with the boundary of the identified dimming region (red) at the end of impulsive phase at 02:22 UT. Points A and B mark the largest north and south dimming extent.