Fig. 10

Wave analysis. Histogram of wave vector angle (θ _kb ) from the mean magnetic field directions below 0.07 Hz (a) in which x-axis shows the variation in the propagation direction and y-axis includes the cumulative number (N) of wave vectors with the condition λ ₂/λ ₃≥5, and (b) histogram of variation in the angle of the wave vector direction with respect to the mean magnetic filed below 0.07 Hz in which x-axis represents the angle of propagation and y-axis shows the cumulative number (N) of wave vectors normalized by total number (\(\sum {N}\)) of wave vectors estimated at each frequencies with the condition λ ₂/λ ₃≥5