Abstract
The intense precipitation of energetic electrons (with an energy of tens of keV) from the Earth’s radiation belt (ERB) is one of the most important sources of ionization in the ionosphere and atmosphere. In this paper, we analyze the spatial distribution of electron fluxes with energies greater than 30 keV at an altitude of 850 km using the maximum amount of statistical data available today. It is found that the region of electron precipitation from the outer zone of the ERB is shifting over North America to the pole, and over Siberia to the equator. Moreover, in the region of the Brazilian magnetic anomaly (BMA), the intensity of the energetic electron fluxes and its area in the 24th solar cycle decreases compared to the 23rd cycle. Based on the analysis of the distribution of quasi-trapped electrons under the radiation belt at low latitudes confirms the mechanism of their rapid radial transfer from the outer zone of the ERB to the Earth. The results obtained are mainly related to the change in the configuration of the Earth’s magnetic field, as well as to the decrease in solar and geomagnetic activity in the 24th solar cycle.
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ACKNOWLEDGMENTS
The authors thank the NOAA/POES Polar Orbiting Space Satellite Division for providing the experimental data on high-energy particles.
Funding
This study was carried out in the framework of State Assignment of the Ministry of Science and Higher Education of the Russian Federation (registration number 122040500060–4). The work of A.V. Dmitriev was supported by grant MOST 108-2111-M-008-035, partly by grant MOST 110-2111-M-008-013, and the Research Foundation of the National Central University of Taiwan.
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Golubkov, M.G., Dmitriev, A.V., Suvorova, A.V. et al. Spatial Distribution of the Precipitations of the Intensive Energetic Electron Fluxes into the Ionosphere within the 23rd and 24th Solar Cycles. Russ. J. Phys. Chem. B 16, 537–542 (2022). https://doi.org/10.1134/S199079312203006X
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DOI: https://doi.org/10.1134/S199079312203006X