Evolution of the intensity for seven AIA channels for three days, starting at 2017-08-28 00:00 UT. These time series are averaged over the black contour displayed in Fig. 1. All the light curves are normalised to standard deviation and offset by arbitrary numbers on the y-axis. For each curve, we display the corresponding period, Fourier power and the associated random occurrence probability. The grey bar indicates the duration of the SST observations.