Fig. 8

Measured NEMI curves for the \(B_{\gamma }\) component. The black curve is the laboratory experiment result on the ground. The light blue and red curves were obtained from the WFC observed on March 19, 2017, from 01:01 to 01:37 and 02:19 to 02:34 UT, during which plasma wave activity was very low. The blue and green curves were obtained from the OFA and HFA observed during 02:25 to 02:30 UT. The gray curve indicates the NEMI for the Van Allen Probes (Kletzing et al. 2013). Gray boxes are typical plasma wave spectra provided for reference. NEMI curves for the other axes showed almost the same levels