Maps of total brightness intensity as a function of time and heliocentric distance for the 24 radial directions considered in the analysis. Each time series of total brightness was normalized to zero mean and unit standard deviation. The radial directions are indicated at the top of the corresponding panel in terms of the PA value, measured counterclockwise from the north pole. In the map referring to PA = 180°, the data corresponding to the tenth annulus are missing since they were outside the Metis FOV.