Delayed energetic proton events at 1 AU

• Authors: Torsti, J.; Vainio, Rami; Halén, Sami; Kuusela, Jyri
• Publication: Solar Dynamic Phenomena and Solar Wind Consequences, Proceedings of the Third SOHO Workshop held 26-29 September, 1994 in Estes Park, Colorado. Edited by J.J. Hunt. ESA SP-373, European Space Agency, 1994, p.311, 1994
• Solar events between 1986 January and 1992 June
• Statistical study
• ADS link
• Abstract: The GOES 6 satellite energetic proton events of the years 1986-1992 are analyzed. 19 of those have a delayed flux component that extends at least to energies of GOES satellite proton energy channel P3, nominally 8.7-14.5 MeV. To explain the existence and the different shapes of the component, we consider models of acceleration and transport of protons at an interplanetary shock wave. The number of delayed events as well as the time delay from the source flare are given as a function of source longitude.
• List of events:
  • 1988 January 2
  • 1988 August 23
  • 1989 March 6
  • 1989 March 10
  • 1989 March 17
  • 1989 May 22
  • 1989 August 12
  • 1989 October 19
  • 1989 November 25
  • 1990 March 19
  • 1990 April 10
  • 1990 June 12
  • 1990 July 25
  • 1991 March 22
  • 1991 July 7
  • 1991 August 25
  • 1991 October 27
  • 1991 October 30
  • 1992 May 8