pure and applied geophysics

, Volume 126, Issue 1, pp 85–101 | Cite as

Forecasting geomagnetic activity

  • R. P. Kane


A study of the daily, monthly and annual values of the geomagnetic activity indexAp for 1932 onwards and of the annualaa indices for 1868 onwards indicated that their variations had large random components. Long-term predictions were not possible from time-series extrapolations.

Key Words

geomagnetic activity Ap indices aa indices 


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Copyright information

© Birkhäuser Verlag 1988

Authors and Affiliations

  • R. P. Kane
    • 1
  1. 1.Instituto de Pesquisas Espaciais-INPESão José dos CamposBrasil

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