Periodic Variation of Solar Flare Index for the Last Solar Cycle (Cycle 24)

Figure 6

XWT (upper panel) and WTC (lower panel) spectrums between whole disk and Northern Hemisphere FI data. The red color represents regions with the most significant interrelation, while blue colors show the lowest dependence between the selected time series. Periodicities obtained outside of the COI for all wavelet plots are usually not reliable. Arrows in the wavelet coherence plots represent the phase relations between the time series. A zero phase difference means that the two time series move together on a particular scale. Arrows point to the right/left when the time series are in phase (antiphase). Arrows pointing to the right-down or left-up indicate that the first variable is leading, while arrows pointing to the right-up or left-down show that the second variable is leading.