Time series of relevant parameters corresponding to the interval 16.2–16.8. From top to bottom: solar wind speed, V_sw (panel a); N components of velocity, V_N, and magnetic field in Alfvén units, V_AN (b); the proton number density, n_p (c), the proton temperature, T_p (d), along with magnetic field magnitude (e), azimuthal, Φ_B (f) and polar angles, Θ_B (g) and θ_BR (h); kinetic, p_k, magnetic, p_m and total pressure, p_tot (i); and the plasma beta, β (j). The color boxes identify the structures which have been grouped in structures 𝒜 and ℬ, along with the beginning of the rarefaction region identified as ℛ. All the structures have been identified with grey boxes apart from ℛ, in light blue, and ℬ₀ and ℬ₂, in light red, as explained in the text.