A wavelet analysis of solar mean magnetic field measurements

Fredrik Boberg, Henrik Lundstedt

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

2 Citations (SciVal)


Solar mean magnetic field (SMMF) measurements from the Wilcox SolarObservatory and with SOHO/MDI are analyzed using continuous wavelettransforms, SMMF variability is found at a number of temporal scales.Detected SMMF variations with a 1-2 year period is considered to belinked to long-term variations in the internal rotation of the Sun.Intermediate SMMF oscillations with a period of 80-200 days are probablyconnected to the evolution of large active regions. We also findevidence for 90 minute variations with coronal mass ejections as aprobable origin.
Original languageEnglish
Title of host publicationIn: Proceedings of the Second Solar Cycle and Space Weather Euroconference, 24 - 29 September 2001, Vico Equense, Italy. Editor: Huguette Sawaya-Lacoste. ESA SP-477, Noordwijk: ,
PublisherESA Publications Division
Publication statusPublished - 2002
Event2nd Solar Cycle and Space Weather Conference - Vico Equense
Duration: 2001 Sep 242001 Sep 29

Publication series



Conference2nd Solar Cycle and Space Weather Conference

Subject classification (UKÄ)

  • Astronomy, Astrophysics and Cosmology


  • Solar Activity
  • Solar Mean Magnetic Field
  • Wavelets


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