Example of a coherent (left panels) and incoherent (right panels) event. From top to bottom: time series of n_p and n_α/n_p (black and blue lines, respectively), wavelet spectrum for n_p, wavelet power spectrum for n_α/n_p, cross-wavelet spectrum, and wavelet coherence. The vertical dashed red lines correspond to the times at whic the wavelet power, at the corresponding PDS frequency exceeds the 75th quantile of the power of the entire six-hour interval. The solid black lines in all spectra depict the cone of influence, where edge effects in the processing become important. The arrows in XWT and WTC point to the phase relation of the two data series in time-frequency space: (1) Arrows pointing to the right indicate in-phase behavior, and (2) arrows pointing to the left indicate antiphase behavior.