Fig. 1: Overview of MMS1 burst data (Event 1).
a Omni-directional energy spectrum of electrons (photoelectrons were subtracted). b Omni-directional energy spectrum of ions. c Number density of ions (light blue) and electrons (black). d, e the background magnetic field (B0) and ion bulk velocity in the geocentric solar magnetic (GSM) coordinates. f, g Wave power spectrum of magnetic and electric fields with the cyclotron resonance velocity (fce) (white) and 0.5fce (grey). h, i Spectra of ellipticity and angle of Poynting flux from B0 with fce (black), 0.5fce (dark grey), 0.25fce (grey), and 0.1fce (light grey). Enhancements of electromagnetic right-hand polarized (positive ellipticity) waves corresponds to whistler-mode waves. Vertical grey dashed lines indicate the interval shown in Fig. 4. Spacecraft positions in Earth radii (RE) are shown at the bottom. MMS crossed the magnetopause southward of the reconnection site from the magnetosphere to the magnetosheath (see also Fig. 2).
