Monthly mean values of $q_1^0$, $s_1^1$ and $s_2^1$ in SM coordinates for all data (blue) and for Active days (red). We use ${⟨q_1^0⟩}_{\mathrm{day}}>50$ nT as the threshold for active days, represented by the horizontal red line in the $q_1^0$ plot. On the right side, using the same y-axis values, we show the Kernel Density Estimation (KDE) to find the most likely values for these three coefficients, shown in red. The highest occurrence value is shown with a horizontal dashed line and its value is given in red above the line.