Skip to main content
. 2023 Jan 27;14:438. doi: 10.1038/s41467-023-36095-x

Fig. 2. NOAA 18 observations of diffuse auroral precipitation event on 14 January 2013.

Fig. 2

a–d Precipitating electron fluxes in different energy channels (189 eV, 844 eV, 2.595 keV, and 7.980 keV, respectively) measured by the Total Energy Detector (TED) onboard the National Oceanic and Atmospheric Administration Polar Orbiting Environmental Satellite 18 (NOAA 18) in the ionospheric position conjugated with the Van Allen Probe A. The black and red curves in a–d denote the data measured by the 0° and 30° detectors, respectively. e–g Precipitating electron fluxes in different energy channels (>40 keV, >130 keV, and >287 keV, respectively) measured by the Medium Energy Proton and Electron Detector (MEPED) onboard NOAA 18. The black and red curves in e–g denote the data measured by the 0° and 90° detectors, respectively. The gray rectangle indicates the electron diffuse auroral precipitation observed by NOAA 18 in the ionospheric position conjugated with Van Allen Probe A, which has detected chorus waves and their second-harmonic near the magnetospheric equator.