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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, V. 22, No. 5, pp. 411-421

Effects of magnetic storms and X-ray solar flares on the ionosphere, according to data obtained using the IonoView program for interactive ionogram processing

S.A. Serebrennikova 1 , V.A. Ivanova 1 , A.V. Podlesnyi 1 , M.V. Cedrik 1 , A.I. Poddelsky 2 , A.Yu. Belinskaya 3 
1 Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russia
2 Institute of Cosmophysical Research and Radio Wave Propagation FEB RAS, Paratunka, Kamchatka Krai, Russia
3 Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia
Accepted: 21.07.2025
DOI: 10.21046/2070-7401-2025-22-5-411-421
This study examines the effects of four heliogeophysical events on the ionosphere: a weak magnetic storm on November 19, 2023, a moderate magnetic storm on November 20–21, 2023, and two X-ray solar flares on February 6 and 12, 2024, illustrated by the results obtained using the IonoView chirp ionosonde network interactive data processing program. The IonoView program is designed to work with data from the chirp sensing network and has a graphical interface for displaying, analyzing and processing ionograms interactively by placing labels. During the period of exposure of the ionosphere to the magnetic storms, the values of maximum observed frequency (MOF) were obtained and analyzed using the IonoView program for two oblique incidence sounding (OIS) paths: Norilsk–Tory and Magadan–Tory. During the main phase of the storm and the recovery phase of the moderate magnetic storm on November 20–21, 2023, a negative ionospheric disturbance lasting more than 12 hours was recorded, which manifested itself in a decrease in the MOF by up to 5 and up to 3 MHz in the case of a weak magnetic storm on November 19, 2023. During the period of exposure to X-ray solar flares of the M class on February 6 and 12, 2024, the values of the lowest observed frequency (LOF) for the OIS paths and the minimum frequency (Fmin) for vertical sounding (VS) in the point were obtained and analyzed in Tory (Buryatia). During the action of the flares, there was an increase in LOF by up to 4 MHz relative to quiet conditions and an increase in Fmin values by up to 1 MHz.
Keywords: ionogram, ionosonde, magnetic storm, X-ray solar flare, IonoView program
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