Comparison of case studies between the maximum of SC23 (left panels) and SC24 (right panels). From top to bottom: time series of the following: solar wind speed, V_sw in km s⁻¹; v − b correlation coefficient, ρ_v − b computed at 1 h scale; proton number density, n_p in cm⁻³; proton average temperature, T_p in K; magnetic field magnitude, B in nT; and oxygen charge state ratio, O⁺⁷/O⁺⁶ indicated as O ratio. The shaded gray boxes indicate the following Alfvénic solar wind intervals: slow wind (events “1” and “2”, explanation in the text) and faster wind (marked as “F”).