Fig. 5

Four-dimensional magnetic energy spectrum projected onto three planes spanning the wavevector components and the spacecraft-frame frequencies in the GSE coordinate system by averaging over the wavevector components orthogonal to the planes (top panels), and that projected onto the three wavevector planes by integrating over the frequencies and averaging over the wavevector components. The wavevectors and the frequencies are normalized to the ion inertial length and the proton gyro-frequency, respectively