Maps of the filtered Hα − 0.4 Å images with v > 14 km s⁻¹ (left) and 4 < v < 14 km s⁻¹ (right). The white contours denote the umbral boundaries at Hα − 1.0 Å. The circles highlight the faint running wavefronts, WF1−WF3 on LB 1 and WF1 and WF2 on LB 2. The blue on LB 1 is used to discern WF2 and WF3. The dotted rectangles mark the FOVs of the two LBs to be analyzed.

(An animation of this figure is available).

The video/animation of this figure is available in the online journal.