Solar proton events in solar activity cycles 21–24

Autor:	Yu. I. Logachev, E. I. Daibog, O. S. Yakovchouk, Leonid Lazutin, V. N. Ishkov, G. M. Surova, I. E. Petrenko, G. A. Bazilevskaya, Leonty I. Miroshnichenko, E. V. Vashenyuk, M. N. Nazarova
Rok vydání:	2015
Předmět:	Solar proton Physics Sunspot Proton Nuclear Theory Hadron Maximum phase General Physics and Astronomy Solar cycle Nuclear physics Physics::Space Physics Coronal mass ejection Physics::Accelerator Physics Astrophysics::Solar and Stellar Astrophysics Nuclear Experiment
Zdroj:	Bulletin of the Russian Academy of Sciences: Physics. 79:573-576
ISSN:	1934-9432 1062-8738
Popis:	It is shown that the number of solar proton events (SPEs) with proton energies (E) higher than 10 and 100 MeV in the current solar cycle (cycle 24) differs slightly from the number of the same events in earlier cycles (cycles 21–23), even though solar activity was low during the growth and maximum phase in cycle 24. A deficit was in this case observed for the most powerful GLE events, which are characterized by high proton fluxes with E > 100 MeV. The ratio of the number of SPEs with E > 10 and 100 MeV to the number of sunspots in cycle 24 doubled, compared to the same ratio in cycles 21–23, and the relative number of GLEs fell by more than half. The characteristics of flares and coronal mass ejections associated with proton events with E > 100 MeV in cycle 24 were virtually the same as the analogous parameters in cycle 23.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e331aaebaf9bf62d03b695d252fb69f8 https://doi.org/10.3103/s1062873815050135 Zobrazit plný text záznamu Full text from SpringerLink