Statistical Analysis of the Relation between Coronal Mass Ejections and Solar Energetic Particles

To improve the forecasting capability of impactful solar energetic particle (SEP) events, the relation between coronal mass ejections (CMEs) and SEP events needs to be better understood. Here we present a statistical study of SEP occurrences and timescales with respect to the CME source locations an...

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Bibliographic Details
Published in:arXiv.org 2020-07
Main Authors: Kihara, Kosuke, Huang, Yuwei, Nishimura, Nobuhiko, Nitta, Nariaki V, Yashiro, Seiji, Ichimoto, Kiyoshi, Asai, Ayumi
Format: Article
Language:English
Subjects:
Coronal mass ejection
Correlation
Energetic particles
Longitude
Solar corona
Statistical analysis
Online Access:Get full text
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Summary:To improve the forecasting capability of impactful solar energetic particle (SEP) events, the relation between coronal mass ejections (CMEs) and SEP events needs to be better understood. Here we present a statistical study of SEP occurrences and timescales with respect to the CME source locations and speeds, considering all 257 fast (\(v_{CME}\) \(\ge\) 900 km/s) and wide (angular width \(\ge\) 60\(^{\circ}\)) CMEs that occurred between December 2006 and October 2017. We associate them with SEP events at energies above 10 MeV. Examination of the source region of each CME reveals that CMEs more often accompany a SEP event if they originate from the longitude of E20-W100 relative to the observer. However, a SEP event could still be absent if the CME is \(
ISSN:2331-8422
DOI:10.48550/arxiv.2007.08062