Characteristics of SEPs during solar cycles 21–24

• Published in: Journal of astrophysics and astronomy Vol. 41; no. 1
• Main Authors: Kumar, Raj, Chandra, Ramesh, Pande, Bimal, Pande, Seema
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01.12.2020; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Astroparticles; Charged particles; Coronal mass ejection; Energetic particles; Observations and Techniques; Physics; Physics and Astronomy; Satellite-borne instruments; Solar cycle; Solar flares; Space weather; coronal mass ejections; solar energetic particle events; Solar flares
• ISSN: 0250-6335; 0973-7758
• DOI: 10.1007/s12036-020-9624-z

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 ≥ 10 pfu) during the solar cycles 21–24 (1976–2017) in > 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 km s - 1 and 253 ∘ , respectively. About 58% SEPs were associated with halo CMEs and 42% of SEPs associated with CMEs width varying from 10 ∘ to 250 ∘ , respectively.