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Fig. 6 | Earth, Planets and Space

Fig. 6

From: Oxygen torus and its coincidence with EMIC wave in the deep inner magnetosphere: Van Allen Probe B and Arase observations

Fig. 6

Van Allen Probe B/EMFISIS observations of a electron density at the satellite position, b average plasma mass, and c, d the dynamic power spectra of wave amplitudes in the directions perpendicular/parallel to the local magnetic field, during 02:10–03:10 UT on 12 September 2017. Data are the same as d, e, 5a, and b. White dots indicate the lower cutoff frequency (fco) of the emission of an electromagnetic ion cyclotron wave

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