Coronal Holes in Global Complexes of Activity

Figure 1

Heliographic maps of the Sun image in the lines 195 A (a) and 284 A (b). The figure shows contour lines of equal brightness, including the lines of double mean brightness (magenta) and tenfold mean brightness (red). The area shaded blue is the region where the brightness is lower than the average on the given day. The black circles are sunspot groups.

(a)

(b)