Prediction of solar energetic particle event histories using real-time particle and solar wind measurements

Details Prediction of solar energetic particle event histories using real-time particle and solar wind measurements Prediction of solar energetic particle event histories using real-time particle and solar wind measurements

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976stin...7717991r&link_type=abstract

Prediction of solar energetic particle event histories using real-time particle and solar wind measurements AFGL

Computer Science

Particle Energy, Real Time Operation, Solar Corona, Solar Wind, Spectroheliographs, Cosmic Rays, Magnetic Fields, Solar Energy, Transport Properties, Velocity Measurement

Scientific paper

The comparatively well-ordered magnetic structure in the solar corona during the decline of Solar Cycle 20 has revealed a characteristic dependence of solar energetic particle injection upon heliographic longitude. When analyzing convection from the corona to the Earth, particle fluxes display an approximately exponential dependence on heliographic longitude. Since variations in the solar wind velocity and hence the coronal connection longitude can severely distort the simple coronal injection profile, the use of real-time solar wind velocity measurements can be of great aid in predicting the decay of solar particle events. Although such exponential injection profiles are commonplace during 1973-1975, they have also been identified earlier in Solar Cycle 20 (e.g., 1967 and 1969), and hence this structure may be present during the rise and maximum of the cycle, but somewhat obscured by greater temporal variations in particle injection.

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