AIA 193 Å base difference image showing the dimming region (blue contour) with an overlaid orthogonal projection of the inner part of the GCS bubble (green mesh). The green marker indicates the source location derived from the GCS reconstruction, and the red marker represents the center of mass of the dimming region. The red mesh illustrates the orthogonal projection of the inner part of the GCS reconstruction, with the source point shifted to the location of the center of mass.