Magnetic fields 2 Solar energy 2 Solar magnetic fields Sun: activity 2 Sun:magnetic fields 2 Active regions 1 Dynamo 1 Eigenvalues and eigenfunctions 1 Flare 1 Interactive devices 1 Magnetic polarity 1 Magnetic waves 1 Methods. Data analysis 1 Methods: miscellaneous 1 Mutual transformations 1 Poloidal components 1 Principal Components 1 Principal component analysis 1 Solar cycle 1 Solar radiation 1 Summary curve 1 Sun: magnetic field 1 Sun: magnetic fields 1 Sunspot 1 Toroidal components 1 Toroidal fields 1 dynamo 1 flares 1 methods: data analysis 1 methods: miscellaneous 1