Large solar energetic particle events of cycle 23: A global view

Details Large solar energetic particle events of cycle 23: A global view Large solar energetic particle events of cycle 23: A global view

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30lsep3g&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 12, pp. SEP 3-1, CiteID 8015, DOI 10.1029/2002GL016435

Astronomy and Astrophysics

Astrophysics

21

Interplanetary Physics: Energetic Particles, Solar, Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections, And Astronomy: Radio Emissions, And Astronomy: Energetic Particles (2114)

Scientific paper

We report on a study of all the large solar energetic particle (SEP) events that occurred during the minimum to maximum interval of solar cycle 23. The main results are: 1. The occurrence rate of the SEP events, long-wavelength type II bursts and the fast and wide frontside western hemispheric CMEs is quite similar, consistent with the scenario that CME-driven shocks accelerate both protons and electrons; major flares have a much higher rate. 2. The SEP intensity is better correlated with the CME speed than with the X-ray flare class. 3. CMEs associated with high-intensity SEPs are about 4 times more likely to be preceded by wide CMEs from the same solar source region, suggesting the importance of the preconditioning of the eruption region. We use a specific event to demonstrate that preceding eruption from a nearby source can significantly affect the properties of SEPs and type II radio bursts.

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