Active Region Prominences and the Yellow Coronal Line.

Regions of the sun characterized by emission of the rarely observed yellow coronal line X 5694 were found to be positively associated with the following characteristic behavior of prominences at the same location: (a) large numbers of associated surge-type prominences; (b) predominance of scattered knots; (c) formation of continuous streamers; (d) downward motion of knots and streamers toward an active center; and (e) sharp curvatures and focusing effects in trajectories. On the other hand, the principal observed characteristics of quiescent solar prominences were found to be negatively associated with the regions of yellow coronal-line emission.