Whistler-triggered VLF emissions in the electron slot and inner radiation belt, as observed at Moshiri (L=1.6)

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概要

• 論文の詳細を見る

• The morphological characteristics of whistler-triggered VLF emissions including diurnal, seasonal variations, K_p dependence, latitudinal distribution and spectral shape, have been investigated based on the VLF data obtained at Moshiri (L=1.6) in Japan during a ten year span (1976 to 1985). The following results have emerged; (1) There does not seem to exist a clear tendency of whistler-triggered emissions to occur at a particular local time, (2) equinoctial maximum in occurrence probability is recognized, (3) the occurrence probability seems to increase with K_p index, (4) the occurrence L shell is localized in two regions; one is L=2.1 to 3.4 (the electron slot region) and the other is just around L=1.6 (the inner radiation belt), and (5) a whistler-triggered emission is characterized by an initial quasi-constant frequency component and a subsequent drastic frequency drift mainly with df/dt=10-20kHz/s. These characteristics are satisfactorily interpreted in terms of the gyroresonance interaction between lightning-generated whistlers and energetic electrons, with a reference to the previous results of lightning-induced particle precipitation.

• 国立極地研究所の論文

著者

• Hayakawa Masashi

  Solar-terrestial Environment Laboratory Nagoya University

関連論文

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• Whistler-triggered VLF emissions in the electron slot and inner radiation belt, as observed at Moshiri (L=1.6)

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