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Observation of shock-accelerated protons by GIOTTO and IMP-8 under solar minimum conditions in February 1986

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Abstract

Solar and shock-accelerated protons were observed by the interplanetary S/C GIOTTO and aboard the Earth orbiting satellite IMP-8 during solar minimum conditions in February 1986. Forward and reverse shock configurations developed on 9–11 February, 1986 and could be recognized by sunward and anti-sunward proton propagation. The results are consistent with a general east-west asymmetry in particle fluxes observed within a distance of 1 AU from the Sun and caused by quasi-perpendicular and quasi-parallel shock configurations in the interplanetary magnetic field. The high-energy protons (>1 GeV) measured simultaneously by ground-based neutron monitors showed a complementary enhanced amplitude in the diurnal variation on 9 February, 1986.

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Authors and Affiliations

  1. Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, Germany

    E. Kirsch

  2. Democritis University of Thrace, Xanthi, Greece

    P. C. Trochoutsos & E. T. Sarris

  3. Space Technology, St. Patrick's College, Maynooth. Co., Kildare, Ireland

    S. McKenna-Lawlor

Authors
  1. E. Kirsch
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  2. P. C. Trochoutsos
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  3. E. T. Sarris
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  4. S. McKenna-Lawlor
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Kirsch, E., Trochoutsos, P.C., Sarris, E.T. et al. Observation of shock-accelerated protons by GIOTTO and IMP-8 under solar minimum conditions in February 1986. Sol Phys 139, 165–175 (1992). https://doi.org/10.1007/BF00147887

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  • DOI: https://doi.org/10.1007/BF00147887

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