Fig. 14. Evolution of the probability pk(t) (plotted as Log[pk(t)]) for
the solar cycle 20. From top to bottom, solar minimum (t = 1339),
ascending phase (t = 1369), maximum (t = 1398), descending phase
(t = 1440), and minimum (t = 1481). The solid lines refer to the instantaneous
probability spectrum, while the dashed lines indicate the
average spectrum. Time t is measured in Carrington rotations.