A study of solar flare electron events from October 1972 through December 1974 from IMP 7 and 8

Details A study of solar flare electron events from October 1972 through December 1974 from IMP 7 and 8 A study of solar flare electron events from October 1972 through December 1974 from IMP 7 and 8

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.7334d&link_type=abstract

Journal of Geophysical Research, vol. 84, Dec. 1, 1979, p. 7334-7342. Research supported by the University of Kansas

Physics

2

Satellite Observation, Solar Electrons, Solar Flares, Electron Density (Concentration), Explorer 47 Satellite, Explorer 50 Satellite, H Alpha Line, Solar Terrestrial Interactions

Scientific paper

Data from the Johns Hopkins University Applied Physics Laboratory Charged Particle Measurement Experiment aboard Imp H and J were searched for solar flare produced intensity increases in greater than 0.2-MeV electrons during the 26-month period from October 1972 through December 1974. Of the 44 solar electron events found during this period, 31 were isolated for a detailed statistical study. Systematics among the characteristics of the electron profiles (e.g., peak intensity times and count rates) and those of the associated flares (e.g., H-alpha onset times, H-alpha importance class, heliocentric coordinates, etc.) were examined, and the significant results are presented in several scatter plots. The results reveal that the time delay between the flare onset and the arrival of the peak electron intensity at 1 AU (time to maximum) is a function of the flare's deviation in heliolongitude from the solar region which was well connected to the earth via a magnetic flux tube; the well-connected flares produced electron intensity maxima in the least time.

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