Characteristic Features of Solar Cosmic Rays in the 21st–24th Solar-Activity Cycles According to Data from Catalogs of Solar Proton Events
| Autor: | O. S. Yakovchouk, V. N. Ishkov, Minh-Duc Nguyen, Leonid Lazutin, E. I. Daibog, G. M. Surova, E. A. Ginzburg, Natalia Vlasova, G. A. Bazilevskaya, Yu. I. Logachev |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Solar proton 010504 meteorology & atmospheric sciences Astrophysics::High Energy Astrophysical Phenomena Cosmic ray Astrophysics 01 natural sciences Geophysics Space and Planetary Science Homogeneous Physics::Space Physics 0103 physical sciences Coronal mass ejection Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Zdroj: | Geomagnetism and Aeronomy. 61:6-13 |
| ISSN: | 1555-645X 0016-7932 |
| DOI: | 10.1134/s0016793221010023 |
| Popis: | Homogeneous series of solar cosmic-ray events for four solar-activity cycles against the background of decreased activity in cycles 23 and 24 are considered. The number of solar cosmic-ray events with energies above 10 MeV decreased insignificantly, while the number of ground-level enhancements in comparison between cycles 23 and 24 decreased by eight times. It is shown that the average contribution of flares to the generation of ground-level enhancements decreased from cycle 23 to cycle 24 by three times, and the average contribution of coronal mass ejections decreased by five times; the average contribution of flares to the generation of solar cosmic rays with energy >10 MeV decreased by 1.3 times, and the average contribution of coronal mass ejections increased by 1.4 times. |
| Databáze: | OpenAIRE |
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