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The possibility of electron stochastic energization to relativisitic energies (≥ 1 MeV) via resonant wave‐particle interactions during a magnetic storm is explored. The minimum electron energy E min for cyclotron resonant interaction with various electromagnetic waves is calculated for conditions representative of storm‐times. Since E min > 1 MeV for resonance with L‐mode ion cyclotron waves, intense stormtime EMIC waves could contribute to relativistic electron loss, but not acceleration. Inside the plasmapause whistler mode waves, and highly oblique magnetosonic waves near the lower hybrid frequency, can resonate with electrons over the important energy range from ∼ 100 keV to ∼ 1 MeV. In low density regions outside the plasmapause, the whistler, RX, LO and Z modes can resonate with electrons over a similar energy range. These waves have the potential to contribute to the stochastic acceleration of electrons up to relativistic energies during magnetic storms.
Horne et al. (Sat,) studied this question.