Morphological comparison between the EUV blob and the white-light bright core. (a) AIA 131 Å base-difference image (at 18:59:43 UT) showing the EUV blob. The dashed red line delineates the top boundary of the EUV blob, and the solid red line represents that of the white-light bright core. (b) K-Cor base-difference image (at 18:59:46 UT) showing the white-light bright core. The FOV of panel a is the same as that of panel b. (c) Height-time profile of the CME EUV core and white-light core. Panel d: is similar to panel c, but shows the width-time profile.