scholarly journals Effect of proton-amplified waves on the evolution of solar energetic particle composition in gradual events

1999 ◽  
Vol 26 (14) ◽  
pp. 2145-2148 ◽  
Author(s):  
Chee K. Ng ◽  
Donald V. Reames ◽  
Allan J. Tylka
Keyword(s):  
Energetic Particle ◽  
Solar Energetic Particle ◽  
Particle Composition

scholarly journals Unusual enhancement of ~ 30 MeV proton flux in an ICME sheath region

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Mitsuo Oka ◽  
Takahiro Obara ◽  
Nariaki V. Nitta ◽  
Seiji Yashiro ◽  
Daikou Shiota ◽  
...  
Keyword(s):  
Shock Front ◽  
Energetic Particle ◽  
Leading Edge ◽  
Solar Energetic Particle ◽  
Interplanetary Shock ◽  
Proton Event ◽  
Sheath Region ◽  
Time Profiles ◽  
Energetic Particle Flux ◽  
Mev Protons

AbstractIn gradual Solar Energetic Particle (SEP) events, shock waves driven by coronal mass ejections (CMEs) play a major role in accelerating particles, and the energetic particle flux enhances substantially when the shock front passes by the observer. Such enhancements are historically referred to as Energetic Storm Particle (ESP) events, but it remains unclear why ESP time profiles vary significantly from event to event. In some cases, energetic protons are not even clearly associated with shocks. Here, we report an unusual, short-duration proton event detected on 5 June 2011 in the compressed sheath region bounded by an interplanetary shock and the leading edge of the interplanetary CME (or ICME) that was driving the shock. While < 10 MeV protons were detected already at the shock front, the higher-energy (> 30 MeV) protons were detected about four hours after the shock arrival, apparently correlated with a turbulent magnetic cavity embedded in the ICME sheath region.

Ionospheric and stratospheric electric field responses to an extreme solar energetic particle event

2020 ◽  
Author(s):  
EDGAR Andrew BERING ◽  
Robert H. Holzworth ◽  
Michael McCarthy ◽  
Michael Kokorowski ◽  
Robyn M Millan ◽  
...  
Keyword(s):  
Electric Field ◽  
Energetic Particle ◽  
Solar Energetic Particle ◽  
Solar Energetic Particle Event ◽  
Particle Event
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