Reconstructed CME bubble in 3D (panel a, red/blue dots) and its orthogonal projections onto the solar sphere (panel b, red/blue dots) together with the boundary of the identified dimming region (panels a and b, cyan). Red and blue dots show the inner and outer parts of the CME bubble, and magenta dots indicate the source location and dimming edge along the direction of dominant dimming evolution (panels a and b). Black lines in panel a have the same meaning as in Figs. 6 and 7. Panel b shows the logarithmic base-ratio SDO/AIA 211 Å image at 10:26 UT.