Correlation between lambda 4278 optical emissions and VLF wave events observed at L approximately 4 in the Antarctic

Details Correlation between lambda 4278 optical emissions and VLF wave events observed at L approximately 4 in the Antarctic Correlation between lambda 4278 optical emissions and VLF wave events observed at L approximately 4 in the Antarctic

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.3376h&link_type=abstract

Journal of Geophysical Research, vol. 85, July 1, 1980, p. 3376-3386.

Physics

6

Antarctic Regions, Electromagnetic Noise, Electromagnetic Radiation, Light Emission, Spectral Correlation, Very Low Frequencies, Electron Precipitation, Electron Scattering, Flux Density, Plasmapause, Signal Analysis, Spectrographs, Wave Propagation

Scientific paper

The paper reports on one-to-one correlations observed at L of about 4 between bursts of ducted VLF noise in the 2 to 4-kHz range and optical emissions at lambda 4278. The optical observations were made at Siple Station, Antarctica, in the austral winter of 1977; the wave activity was recorded at Siple and its conjugate station Roberval, Can. Most of the events occurred near dawn during or shortly after substorm events. In most cases the plasmapause was equatorward of Siple, and the equatorial densities were low. The estimated precipitated energy fluxes ranged from 0.04 to 0.1 ergs/sq cm/s; the correlated VLF activity usually consisted of clusters of discrete rising tones or chorus of 1 to 10 s duration. The data were consistent with scattering of electrons into the loss cone over Siple by emissions triggered by waves propagating away from the equator after reflection in the ionosphere over Siple.

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