Hovmöller diagrams (longitude vs. time at fixed latitude) derived from the joint observations of the STEREO/EUVI 195 Å and SDO/AIA 193 Å instruments for latitudes 35° South (Panel (A)) and 35° North (Panel (B)) as shown in Figure 1. Each Hovmöller diagram is averaged over ±2° in latitude. The electronic edition of the Journal has an animated version of the scan across solar latitudes from 65° South to 65° North. (We note that time runs from bottom to top in these panels, contrary to the convention used in Bartels maps, Bartels 1934).

(An animation of this figure is available.)

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