12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room F(201/202/203/204)

[SH128] What can we learn from the interaction between two CMEs in the large gradual SEP event on 2013 May 22?


  • Guiming LE

Primary authors

  • Yulin CHEN (School of Physics and Optoelectronic Engineering, Institute of Space Weather, Nanjing University of Information Science & Tec, China)


  • Guiming LE (Key Laboratory of Space Weather, National Center for Space Weather, China Meteorological Administration, China)


A number of researchers suggested that large, fast CMEs overtake the ones emitted previously from the same or nearby active regions and then interact with each other may be a key factor determining the SEP production (Gopalswamy et al., 2002; Ding et al. 2013). However, Richardson et al. (2003) argued that the interaction between two CMEs is not a key factor controlling the SEP intensity. Two CMEs overlap in projection and intersect height-time profiles do not mean that there is a physical interaction between the CMEs (Richardson et al. 2003). Kahler and Vourlidas (2014) suggested that the relevance of CME interactions for larger SEP event intensities remains unclear. The real interaction between two CMEs related to the large gradual SEP event on 2013 May 22 happened and has been investigated by Ding et al. (2015). We study the properties of the variation in the large SEP event occurred on 2013 may 22 and compared with the some other large SEP events and then concluded that physical interaction between CMEs have not happened in most large SEP events.