Forecast of Solar Energetic Particles Depending on Magnetic Connectivity and Coronal Mass Ejection Properties Using Multi-Spacecraft Observations
Abstract
Strong and large solar energetic particles (SEPs) are mostly accelerated by coronalmass ejection (CME)-driven shocks and then they are propagated via solar magneticfields into the interplanetary space. To observe SEPs generated by the shocks,spacecraft should be magnetically connected to the forming regions of the shocks. Ifthe spacecraft are magnetically well connected to the center of the shock, there is ahigh possibility to observe SEPs. Thus, in terms of SEP forecast, it is important totake into account CME and shock properties in addition to the magnetic connectivityof SEPs. In this study, we investigate the characteristics of SEPs in 1 ~ 100 MeVproton channels depending on CME speeds, angular widths of shock forming regionsand the separation angles between shock forming regions and spacecraft magneticfootprints observed from multi-spacecraft (STEREO-A, STEREO-B, SOHO, GOSEand ACE). Furthermore, we develop SEP forecast models for the SEP onset time andthe SEP peak flux using the separation angles and the CME properties.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 09, 2018
- Source ID
- FA23861714093
Entities
People
- Jinhye Park
Organizations
- Air Force Office of Scientific Research
- Kyung Hee University
- United States Air Force