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A plasmaspheric cavity resonance in a longitudinally non-uniform plasmasphere

Earth, Planets and Space volume 55, pages 219–222 (2003)Cite this article

Abstract

Power spectra of a plasmaspheric cavity resonance (strictly, a plasmaspheric virtual resonance) in a longitudinally non-uniform plasmasphere are calculated. It is shown that the spectra depend on longitude. Therefore, a cavity resonance mode can have local time depending spectra when the plasmasphere is non-uniform in a longitudinal direction. This fact concludes that the local time dependent peak frequencies of the mid- and low-latitude Pi2 pulsations discussed by Kosaka et al. (2002) are also explained by the cavity resonance model. We also discuss that the surface eigenmode can be a possible generation mechanism for Pi2 pulsations localized in a longitudinal direction.

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Authors and Affiliations

  1. Meteorological College, Kashiwa, 277-0852

    S. Fujita

  2. Faculty of Education, Yamaguchi University, Yamaguchi, 753-8531

    M. Itonaga

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  1. S. Fujita
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  2. M. Itonaga
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Correspondence to S. Fujita.

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Fujita, S., Itonaga, M. A plasmaspheric cavity resonance in a longitudinally non-uniform plasmasphere. Earth Planet Sp 55, 219–222 (2003). https://doi.org/10.1186/BF03351751

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  • DOI: https://doi.org/10.1186/BF03351751

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