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Solar proton events during solar cycles 19, 20, and 21

Solar Physics (Heliophysics)Solar VariabilityEngineeringPhysicsNatural SciencesSolar Proton EventsSpace PhysicCosmic RaySolar-terrestrial InteractionSolar Physics (Solar Energy Conversion)Space WeatherSolar PhysicSolar ActivityNuclear AstrophysicsAstrophysics