Mathematics – Probability
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.5157s&link_type=abstract
Journal of Geophysical Research, vol. 81, Oct. 1, 1976, p. 5157-5162.
Mathematics
Probability
Interplanetary Magnetic Fields, Solar Activity Effects, Solar Flares, Solar Flux, Solar Protons, Sudden Storm Commencements, Explorer 34 Satellite, Geomagnetism, Magnetic Storms, Satellite Observation
Scientific paper
Data obtained by Explorer 34 near a solar-activity maximum for the solar-proton monitoring experiment are analyzed. Englade's (1971) model of solar-proton emission and propagation is described, and observed proton-fluxincreases are identified. Associations of flux increases detected by Explorer 34 with solar flares are discussed, and the relation of flux increases to geomagnetic-storm sudden commencements (sc's) and to crossings of interplanetary magnetic sector boundaries (sb's) is investigated. The results of the analysis show that flux maxima clearly tend to occur near sc's, that the occurrence of a Forbush decrease enhances the probability of an association of an sc with an increase in a 10-MeV proton flux, and that flux increases tend to occur on the day before a sector-boundary crossing. It is found that of 77 observed flux increases, 44 are associated directly with flares, 19 are associated with sc's, and nine are associated with sb's. Differences in the characteristics of increases associated with flares, sb's, and sc's are summarized.
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