Abstract
Short-lived (∼ 15 min), low-energy proton increases associated with the passage of interplanetary shock waves have been previously reported. In the present paper, we have examined in a fine time scale (∼ 1 min) the concurrent particle and magnetic field data, taken by detectors on Explorer 34, for four of these events which occurred on 30 May 1967, 5 June 1967, 29 November 1967, and 11 January 1968. Our results further support the view that these impulsive events are due to confinement of the solar cosmic-ray particles in the region just ahead (∼ 106 km) of the advancing shock front. Data from the Pioneer 7 spacecraft for a similar event on 30 August 1966, when this spacecraft was 1.9 × 106 km from the Earth, are shown to be consistent with this interpretation.
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Palmeira, R.A.R., Allum, F.R. Evidence for confinement of low-energy cosmic rays ahead of interplanetary shock waves. Sol Phys 30, 243–253 (1973). https://doi.org/10.1007/BF00156193
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DOI: https://doi.org/10.1007/BF00156193