3 Solar Activity Data

 3.1 Sunspot numbers
 3.2 Sunspot areas
 3.3 10.7 cm solar flux
 3.4 Total irradiance
 3.5 Magnetic field
 3.6 Flares and Coronal Mass Ejections
 3.7 Geomagnetic activity
 3.8 Cosmic rays
 3.9 Radioisotopes in tree rings and ice cores

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