Fig. 1: An overview of the radiation belt electron flux across a number of energies during 6–20 October 2012. | Nature Communications

Fig. 1: An overview of the radiation belt electron flux across a number of energies during 6–20 October 2012.

From: Local heating of radiation belt electrons to ultra-relativistic energies

Fig. 1

a–g Show the electron flux measured by the REPT instrument on NASA’s Van Allen Probe A and B for electron energies from 1.8 to 7.7 MeV. The flux corresponds to a local pitch angle of 90° and the associated L* coordinate has been calculated using the TS07 magnetic field model27. Only electron flux measurements above the noise floors28 of REPT17 have been shown. h Shows the evolution of the north–south component (relative to the Earth’s magnetic field) of the interplanetary magnetic field (IMF Bz) for the period, and i shows the disturbance storm time index (Dst), a measure of the geomagnetic storm intensity. The geomagnetic activity on the 9 October, resulting from a period of strongly negative IMF Bz, produced an enhancement in the electron flux over a broad energy range, including at 7.7 MeV.

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