Abstract
Based on the data of the high-apogee satellite Prognoz-3, the April 29–30, 1973 solar particle event is analysed. The event's complex energetic particle, interplanetary magnetic field and solar wind plasma properties are discussed. The unusual behaviour of solar particles up to energies ≈100 MeV can well be explained in terms of the interaction with an interplanetary shock wave system passing the Earth. Assuming that the structure of the interplanetary shock wave system is similar to that considered first by Parker (1961) and Gold (1959) and reviewed later by Hundhausen (1972) and Dryer (1974, 1975), the main characteristics of the energetic particle fluxes, solar wind and interplanetary magnetic field can be understood.
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Gombosi, T., Kóta, J., Somogyi, A.J. et al. Analysis of the complex solar particle event on April 29–30, 1973. Sol Phys 54, 441–456 (1977). https://doi.org/10.1007/BF00159935
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DOI: https://doi.org/10.1007/BF00159935