- 1European Space Agency (ESA), European Space Astronomy Centre (ESAC), Camino Bajo del Castillo s/n, 28692 Villanueva de la Cañada, Madrid, Spain
- 2Universidad de Alcalá, Space Research Group (SRG-UAH), Plaza de San Diego s/n, 28801 Alcalá de Henares, Madrid, Spain
Detailed analysis of solar energetic particle (SEP) events sometimes strongly suggests that the energetic particles measured by well-connected spacecraft are mainly accelerated by a coronal mass ejection (CME)-driven shock, as for example, the SEP event on 2013 August 19 or on 2022 January 20.
In this study, we analyse the relations between the solar activity and the SEP peak intensities measured by MESSENGER, STEREO and ACE spacecraft during 2010-2015. We investigate the 3D kinematic profile of the CME and associated shock wave from 1 to 15 hours and determine their main morphological (size) and dynamic (propagation and expansion speeds, acceleration) properties. We study their relationship with the main characteristics of the SEP events (for protons and electrons), such as peak flux and timing measured in situ. A summary of the results, implications for the Space Weather research, and comparison with previous works is presented.
How to cite: Rodríguez-García, L.: Acceleration of SEPs in the inner heliosphere. What CME properties account for SEP events?, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-8043, https://doi.org/10.5194/egusphere-egu25-8043, 2025.
