Distribution of the detected peaks over time for the three frequency bands, from top to bottom: 2090–2620 μHz, 2620–3160 μHz, and 3160–3710 μHz. Each bin corresponds to one year from 1995 to 2025. Dashed curve shows the Epanechnikov kernel density estimations (KDE) of the probability distributions from each histogram. Periods of low and high magnetic activity were reported from Table 2 and $\overline{F_{10.7}}$ is reported in black, in the middle panel, for comparisons.