Physics
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.1715v&link_type=abstract
Journal of Geophysical Research, vol. 80, May 1, 1975, p. 1715-1724. National Research Council of Canada
Physics
3
Cosmic Rays, Galactic Radiation, Interplanetary Magnetic Fields, Radiant Flux Density, Energy Spectra, Proton Flux Density, Satellite Observation, Solar Activity Effects
Scientific paper
The cosmic ray intensity variations over the energy range of about 0.5 MeV to 1 GeV during the early part of August 5 are discussed in relation to the intensity changes during the entire period of activity (August 2 to 11). Measurements of the interplanetary magnetic field and particle data from ground-based neutron monitors, lunar sensors, and detectors in board Explorers 41 and 43 are used in the investigation. Analysis is made of intensity changes during the period from 0200 to 0700 UT on August 5, the north-south asymmetry in neutron monitor intensities, changes in the alpha particle/proton flux ratios, the lag in onset times as recorded by the two Explorers, and observations of flux enhancement by the lunar detectors. The results indicate that the enhanced particle fluxes (about 1 GeV) were due to a leakage of galactic cosmic rays into a low-intensity region of the interplanetary magnetic field bounded by tangential discontinuities, which connected to different particle sources both near the sun and in the outer solar system.
Bostrom C. O.
Fairfield Donald H.
Lanzerotti Louis J.
Mathews Titus
Venkatesan D.
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