The study of the solar energetic particle events (SEPs) and their association with solar flares and other activities are very crucial to understand the space weather. Keeping this in view, here we present the study of SEPs (intensity $$\ge 10$$ ≥ 10 pfu) during the solar cycles 21–24 (1976–2017) in $$> 10$$ > 10 MeV energy channels associated with solar flares. For our analysis, we have used the data from different instruments onboard SOHO satellite. We have examined the flare size, source location, coronal mass ejections (CMEs) characteristics of associated SEPs. About 31% and 69% of the SEPs were originated from the eastern and western solar hemisphere, respectively. The average CME speed and width were $$1238\hbox { km s}^{-1}$$ 1238 km s - 1 and $$253^{\circ }$$ 253 ∘ , respectively. About 58% SEPs were associated with halo CMEs and 42% of SEPs associated with CMEs width varying from $$10^{\circ }$$ 10 ∘ to $$250^{\circ }$$ 250 ∘ , respectively.

中文翻译：

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太阳周期中 SEP 的特征 21-24

研究太阳高能粒子事件 (SEP) 及其与太阳耀斑和其他活动的关联对于了解空间天气非常重要。考虑到这一点，我们在此展示了太阳周期 21-24（1976-2017）中 SEP（强度 $$\ge 10$$ ≥ 10 pfu）的研究，相关的 $$> 10$$ > 10 MeV 能量通道与太阳耀斑。在我们的分析中，我们使用了来自 SOHO 卫星上不同仪器的数据。我们已经检查了相关 SEP 的耀斑大小、源位置、日冕物质抛射 (CME) 特征。大约 31% 和 69% 的 SEP 分别来自东太阳半球和西太阳半球。CME 的平均速度和宽度分别为 $$1238\hbox { km s}^{-1} $$ 1238 km s - 1 和 $$253^{\circ }$$ 253 ∘ 。