Estimate of Lower Ionosphere Ionization during Solar Flares
of the X Class According to VLF Observations

I. A. Ryakhovsky; Ряховский И. А.; Yu. V. Poklad; Поклад Ю. В.; B. G. Gavrilov; Гаврилов Б. Г.

doi:10.31857/S0016794022600648

Estimate of Lower Ionosphere Ionization during Solar Flares of the X Class According to VLF Observations

作者: Ryakhovsky I.A.¹, Poklad Y.V.¹, Gavrilov B.G.¹
隶属关系:
1. Sadovcky Institute of Geosphere Dynamics
期: 卷 63, 编号 4 (2023)
页面: 422-428
栏目: Articles
URL: https://journal-vniispk.ru/0016-7940/article/view/134732
DOI: https://doi.org/10.31857/S0016794022600648
EDN: https://elibrary.ru/PLAMRF
ID: 134732

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详细
作者简介
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详细

The results of analysis of measurements of the amplitudes and phases of the GQD (19.6 kHz) and
GBZ (22.1 kHz) VLF transmitter signals at the Mikhnevo IGD observatory are presented to estimate of the
influence of the solar flares X 2.2 and X 1.5 on June 10, 2014 on the electron concentration in the lower ionosphere.
The flux of the X-rays in the more rigid spectral ranges of 0.01‒0.3, 0.01‒0.26, and 0.01‒0.22 nm
was calculated based on the measurements of the X-ray emissions at wavelengths of 0.05–0.4 nm and 0.1–
0.8 nm at the GOES satellite. That allowed us to find the ionization rate and the emission spectrum ranges
that influenced the electron concentration dynamics most strongly. It is shown that if the duration of the forefront
is substantially less than the characteristic recombination time, the change in the electron concentration
profile in the lower ionosphere on the flare front is related linearly to the changes in the X-ray emission flux.

参考

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