Stacked images of 3C 84 at 15, 43, and 86 GHz. Left: 15 GHz stacked images of epochs from 2010 to 2020, as listed in Table F.3. The green disc represents the common circular beam used to convolve all images before averaging. The continuous red line depicts the ridge line, which is the point with the highest intensity at each slice. Each axis is in units of mas. The coloured region and contours correspond to regions with a S/N of at least five. Details of the beam size, flux, and rms are listed in Table F.9. The contour levels are −2%, −1%, −0.5%, 0.5%, 1%, 2%, 4%, 8%, 16%, 32%, and 64% of the intensity peak. Middle: same as left panel, but for 43 GHz. An epoch summary is listed in Table F.2. Details of the beam size, flux, and rms are listed in Table F.9. Right: same as left and middle panels, but for 86 GHz. An epoch summary is listed in Table F.1. The common convolving beam is listed in Table F.9. Details of the beam size, flux, and rms are listed in Table F.9 as well. For a zoomed-out view of the 86 GHz total intensity map at different time bins, including the 2010–2020 bin presented here, see Fig. F.1.