Subionospheric VLF/LF phase perturbations produced by lightning-whistler induced particle precipitation

Details Subionospheric VLF/LF phase perturbations produced by lightning-whistler induced particle precipitation Subionospheric VLF/LF phase perturbations produced by lightning-whistler induced particle precipitation

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.7457i&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Aug. 1, 1985, p. 7457-7469.

Statistics

58

Electron Precipitation, Ionospheric Disturbances, Lightning, Low Frequencies, Radio Attenuation, Very Low Frequencies, Whistlers, Ionospheric Electron Density, Loran C, Particle Precipitation

Scientific paper

Rapid phase perturbations of subionospherically propagating VLF/LF signals are associated with lightning-generated whistlers which propagate in the magnetosphere. The perturbations, called 'Trimpi events' or 'Trimpi effects' after their discoverer, are attributed to alterations in the earth-ionosphere waveguide caused by localized enhancements in the ionospheric D region. These enhancements are produced by bursts of high-energy electrons which are precipitated out of the earth's radiation belts by the whistler waves. The present paper has the objective to present and discuss new evidence of whistler-associated phase perturbations of subionospheric signals. Events of this type, called phase Trimpi's were first reported by Lohrey and Kaiser (1979). Attention is given to occurrence statistics in terms of the seasonal distribution and hourly rate of events, possible effects on global VLF/LF navigation, and an interpretive model.

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