Variation of parameters of the D-layer of the ionosphere during powerfull solar x-ray flashes

Yu. V. Poklad; B. G. Gavrilov; V. M. Ermak; A. N. Lyakhov; I. A. Ryakhovskiy; V. A. Rybakov

doi:10.1117/12.2540948

18 December 2019 Variation of parameters of the D-layer of the ionosphere during powerfull solar x-ray flashes

Yu. V. Poklad, B. G. Gavrilov, V. M. Ermak, A. N. Lyakhov, I. A. Ryakhovskiy, V. A. Rybakov

Proceedings Volume 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 112089J (2019) https://doi.org/10.1117/12.2540948
Event: XXV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2019, Novosibirsk, Russian Federation

Abstract

In September 2017, several X-class solar X-ray flashes occurred. The paper presents the variations of the parameters of the D-layer of the ionosphere during X-ray X-ray flashes on the propagation path of signals from the VLF GQD and GBZ transmitters, and received in the geophysical observatory "Mikhnevo". The dependences of variations in the parameters of the ionosphere from the X-ray flux in different ranges are obtained. It is shown, that the dependences of the parameters of the ionosphere (effective reflection height and electron density increase rate with height) versus the Xray flux in the ranges of 0.05–0.4 nm and 0.1–0.8 nm are very different for different solar X-ray flashes. This may be due both to different initial states of the ionosphere and to the fact that the X-rays radiation with wavelength less than 0.05 nm can play a major role in the ionization of the atmosphere at altitudes of 50-60 km.

Citation Download Citation

Yu. V. Poklad, B. G. Gavrilov, V. M. Ermak, A. N. Lyakhov, I. A. Ryakhovskiy, and V. A. Rybakov "Variation of parameters of the D-layer of the ionosphere during powerfull solar x-ray flashes", Proc. SPIE 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 112089J (18 December 2019); https://doi.org/10.1117/12.2540948

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