Simultaneous Observations of Lower Band Chorus Emissions at the Equator and Microburst Precipitating Electrons in the Ionosphere

On 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...

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Bibliographic Details
Published in:Geophysical research letters 2018-01, Vol.45 (2), p.511-516
Main Authors: Mozer, F. S., Agapitov, O. V., Blake, J. B., Vasko, I. Y.
Format: Article
Language:English
Subjects:
Altitude
chorus makes microbursts
Chorus waves
Duration
Dye dispersion
Electron density
Electron flux
Electron pulses
Electrons
Equator
Fluctuations
Ionosphere
Low altitude
Magnetic field
Magnetic fields
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Summary:On 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,
ISSN:0094-8276
1944-8007
DOI:10.1002/2017GL076120