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Energetic particles during the first two years of SOHO science mission

  • Authors: Anttila, A.; Torsti, J.
  • Publication: Advances in Space Research, Volume 29, Issue 3, p. 319-324, 2002
  • Solar events between 1996 March and October, solar minimum of 1976 July, solar minimum of 1986 June
  • Statistical study
  • ADS link
  • Abstract: Energetic particle intensities observed by ERNE instrument onboard SOHO spacecraft during the first two years of SOHO science mission have been analysed and compared to observations of IMP 8 satellite around two earlier sunspot minima. During an eight month period around the latest sunspot minimum, which occurred in October 1996, energetic particle intensities stayed at a lower level than during any equivalent period around solar minima of July 1976 and June 1986. During the period from March to October, 1996, there was not a single day, when the daily averaged intensity of 1.6-3 MeV protons exceeded the level of 1 proton/(cm2 sr s MeV). Also monthly counts of grouped solar flares and mean monthly sunspot number were lower than during minima of 1976 and 1986.

Created by mevali. Last Modification: Wednesday 23 of May, 2007 08:46:52 UTC by mevali.