Example of waveform corresponding to proton scale ion-cyclotron waves measured during interval 3 in Fig. 5. Magnetic field components and density are shown in top left panel with the same colour code of Fig. 6. Top-right panel: power spectrum of the fluctuations. Bottom-left panel: fluctuating transverse components over a shorter interval, while bottom-right panel: corresponding hodogram. the diamond identifies the beginning of the interval plotted.