Figure 9.

Relationship between compressional magnetic field oscillations and quantities related to DMI and DCI, shown for RBSP A orbit 2920. (a) Dynamic spectra of the B _μ component. (b) Magnetic field magnitude. (c) Electron number density. (d)–(k) Parameters derived from proton fluxes measured by the HOPE and RBSPICE experiments. See text for definition. Some parameters are color coded to indicate the components perpendicular (red) and parallel (blue) to the background magnetic field. The areas shaded yellow or blue indicate sustained intervals of negative ${\eta }_{{\mathrm{H}}^{+}}$. The gray shading indicates the parameter domain satisfying the condition for DCI or DMI. (l–n) Magnetic coordinates of the spacecraft.