Left: 3D plot of IMF vector in RTN coordinates immediately downstream of shock #2 (magenta plane), where time period (5) is highlighted (red shaded area). Right: In situ analysis targeting time period (5), where we display, from top to bottom, the magnetic-field magnitude and its components, the Z parameter, and the B–V correlation for the tangential components of magnetic-field and ion velocity, indicating a fluctuation with a high degree of Alfvènicity and a cross helicity close to −1.