Synoptic view of the results of the spectral analysis performed for each subsector of sectors A (top panel), B (middle panel), and C (bottom panel) at 1.8 R_⊙. The subsectors are labeled according to Table 2, and the reported periodicities are those with a confidence level of at least 95%. As indicated in each panel, the blue and red bullets refer to the 13 min and 42 min periodicities, respectively.