Solar system 6 ACTIVITY CYCLES 5 CICLOS DE ACTIVIDAD 5 ESTRELLAS ENANAS TARDIAS 5 FLARES 5 FULGURACIONES 5 Activity cycles 4 Arrival time 4 Electron beams 4 Energetic particle measurement 4 Energetic particles 4 Fast solar winds 4 High-energy particles 4 In-situ measurement 4 Interplanetary coronal mass ejections 4 Interplanetary magnetic fields 4 Interplanetary spacecraft 4 Magnetic bubbles 4 Magnetic fields 4 Magnetic structure 4 Magnetoplasma 4 Methods:data analysis 4 Neutron monitors 4 Parker spiral 4 Path length 4 Pitch-angle scattering 4 Plasma parameter 4 Radio bursts 4 Relativistic particles 4 Relativistic solar particles 4