Electron density variations in the ionospheric d-region at mid-latitudes during magnetic storm on 7–11 November 2004, conditioned by morning solar terminator

1Gokov, AM, 2Tyrnov, OF
1V.N. Karazin National University of Kharkiv, Kharkiv, Ukraine
2V.N. Karazin Kharkiv National University, Kharkiv, Ukraine
Kosm. nauka tehnol. 2006, 12 ;(5-6):069-078
Publication Language: Russian
We present the results of experimental investigations of the electron density variations in the middle latitude ionospheric D-region during passing morning solar terminator in the period of magnetic storm on 7–11 November 2004 by the partial reflection radar. It is found an enhancement of the electron density of about 450–700 % both in the period of passing morning solar terminator and during tens minutes after this event. To explain such events, a hypothesis on electron precipitations from the magnetosphere stimulated by morning solar terminator is used. Estimation of the ionization rate is made. On the basis of the experimental data on electron density changes over the electron precipitation periods, the corresponding fluxes are estimated: p = (0.6–8.8) • 109 m~2s_I.
Keywords: electron precipitations, magnetosphere, terminator
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