Fig. 6

Parameters of the event 2 pulsation in the E–W direction: a \(B_Y\) waveforms at KEV (magenta) and KIL (green); b normalized PSD spectra; c E–W spectral coherence for \(B_Y\) (solid) and \(B_X\) (dashed); d E–W PSD ratio for \(B_Y\) (solid) and \(B_X\) (dashed)