New results on the site of initiation of coronal mass ejections

In this paper it is shown that in some months of the phase of minimum solar activity 1985–1987 as many as (80–90)% of a total number of CMEs occur near belts of streamers with neutral line (NL), and only (10–20)% of them appear near belts of streamers without NL. (Streamers without NL separate regions in the corona with the same direction of radial fields of magnetic tubes originating from adjacent coronal holes). With increasing solar activity, the center of gravity of the number of emerging CMEs is shifting toward belts of streamers without NL and reaches over 80% of their total number in some months by the end of 1989. The CME position angle (PA) coincides, on average, with the angle of the portion of NL which straddles the CME. It is quite possible that this condition is satisfied not in the average but rigorously for each CME.

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