Sizes and locations of coronal mass ejections - SMM observations from 1980 and 1984-1989

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Solar Activity, Solar Corona, Solar Cycles, Solar Magnetic Field, Stellar Mass Ejection, Coronagraphs, Latitude, Solar Prominences

Scientific paper

A statistical description of the sizes and locations of 1209 mass ejections observed with the SMM coronagraph/polarimeter in 1980 and 1984-1989 is presented. The average width of the coronal mass ejections detected with this instrument was close to 40 deg in angle for the entire period of SMM observations. No evidence was found for a significant change in mass ejection widths as reported by Howard et al. (1986). There is clear evidence for changes in the latitude distribution of mass ejections over this epoch. Mass ejections occurred over a much wider range of latitudes at the times of high solar activity (1980 and 1989) than at times of low activity (1985-1986).

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