Localized auroral disturbance in the morning sector of topside ionosphere as a standing electromagnetic wave

E. M. Dubinin, P. L. Israelevich, N. S. Nikolaeva, I. Kutiev, I. M. Podgorny

Research output: Contribution to journalArticlepeer-review

Abstract

An intense, localized auroral disturbance observed by Intercosmos-Bulgaria-1300 satellite in the morning sector at the altitude 850 km is analyzed in detail. The disturbance is characterized by strong "jumps" of electric and magnetic fields reaching ∼ 80 mV/m and ∼ 100 nT, fluctuations of ion density (Δn/n ∼ 70%) and bursts of downward and upward energetic electron fluxes. Electric and magnetic disturbances display a distinct spatial-temporal relationship typical for the standing quasi-monochromatic wave (f{hook} ∼ 1 Hz, λx ∼ 10 km). The ratio of amplitudes of electric and magnetic fluctuations is equal to Alfvén velocity (ΔE/ΔB ∼ vA/c). However, a strong parallel component of the electric field (∼ 30 mV/m) and large ion density fluctuations indicate significant changes of plasma properties (the effects of anomalous resistivity are possible).

Original languageEnglish
Pages (from-to)597-606
Number of pages10
JournalPlanetary and Space Science
Volume33
Issue number6
DOIs
StatePublished - Jun 1985
Externally publishedYes

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