Orbit-by-orbit variations of solar wind parameters and ion precipitation fluxes for CME event. The horizontal axis denotes the MAVEN orbit number. From top to bottom, the subplots display (a) the magnetic field strength, (b) solar wind dynamic pressure, (c) Alfvén Mach number, (d) low-energy ion precipitation flux (30–650 eV), and (e) high-energy ion precipitation flux (650–25,000 eV). The shaded region marks the event period.