Abstract
AbstractOn 11 December 2016 at 00:12:30 UT, Van Allen Probe‐B, at the equator and near midnight, and AC6‐B, in the ionosphere, were on magnetic field lines whose 100 km altitude foot points were separated by 600 km. Van Allen Probe‐B observed a 30 s burst of lower band chorus waves (with maximum amplitudes >1 nT) at the same time that AC6‐B observed intense microburst electrons in the loss cone. One second averaged variations of the chorus intensity and the microburst electron flux were well correlated. The low‐altitude electron flux expected from quasi‐linear diffusion of the equatorial electrons by the equatorial chorus is in excellent agreement with the observed, 1 s averaged, low‐altitude electron flux. However, the large‐amplitude, <0.5 s duration, low‐altitude electron pulses require nonlinear processes for their explanation.
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