Ratio of the PSD over the predicted confidence line from the CNN model for 1 January 2014 over the background Hα intensity map (the Hα maps have an artificially increased contrast for clearer visualization of the dark structures). The predictions were binned in frequency with an increment of 0.055 mHz. We show the approximate period ranges associated with each frequency bin. The black boxes represent events reported in Luna et al. (2018) within the respective period range. The red boxes represent newly detected events that are thought to be related to filament oscillations that are further discussed in the text.