2 Solar Activity: Concept and Observations

 2.1 The concept of solar activity
 2.2 Indices of solar activity
  2.2.1 Direct solar indices
  2.2.2 Indirect indices
 2.3 Solar activity observations in the pre-telescopic epoch
  2.3.1 Instrumental observations: Camera obscura
  2.3.2 Naked-eye observations
  2.3.3 Mathematical/statistical extrapolations
 2.4 The solar cycle and its variations
  2.4.1 Quasi-periodicities
  2.4.2 Randomness vs. regularity
  2.4.3 A note on solar activity predictions
 2.5 Summary

  Go to previous page Go up Go to next page