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Fig. 4 | Earth, Planets and Space

Fig. 4

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

Fig. 4

Van Allen Probe B observations of a the dynamic power spectrum of the magnetic field variations in the azimuthal component with selected peak frequency indicated by black dots, b the selected peak frequency, c mass density at the satellite position, d electron density at the satellite position, and e average plasma mass, during 02:00–09:30 UT on 12 September 2017. In be, colors indicate results of different eigen-frequencies, that is, fundamental (f1): red, second harmonic (f2): orange, and third harmonic (f3): green. fj Same as in ae but for the Arase observations during 03:00–11:00 UT on 12 September 2017

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