The Gnevyshev Gap Effect in Solar Cosmic Rays
نویسندگان
چکیده
The phenomenon of the double-peak solar cycle structure (Gnevyshev, 1963) is used to study the solar cosmic ray origin. Solar proton events are diminished in number and energetic particle intensity during the maximum solar activity phase. It is shown that during the same time periods the Ground Level Enhancements disappeared almost simultaneously with solar flares of large area and long lasting X-ray emission. Averaged solar proton (E>10 MeV) intensity of the non-relativistic events also suffers depressions which correlate with depletions in proxies for interplanetary disturbances.
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