Observations and modeling of the (I)CME. Observations of the CME as seen from (a) LASCO/C2 and (c) STEREO-A. Bright emission fronts seen in STEREO-A are indicated exemplary by red arrows. GCS-reconstructed CME fronts are shown as green mesh in (b) and (d), respectively, on the respective white-light coronagraph data. (e) DBEM-based CME propagation direction (red dashed line) and width (red-shaded area) in context with the interplanetary position of operating spacecrafts (triangles) and planets (bullets).