Fig. 4
From: History and development of coronal mass ejections as a key player in solar terrestrial relationship
a Evolution of K-coronal intensity at a heliocentric distance of 1.5 Rʘ above the east limb (dashed line) compared with the evolution of 80 MHz flux density (solid curve). b the position of the coronal transient feature is denoted by the solid curve (corresponding to 23:30 UT on 1970 August 11). The symbols indicate the moving type IV radio sources at different times. The open circle indicates the locations of a stationary radio source. The solid and dashed circles are at heliocentric distances of 1 and 1.5 Rʘ, respectively. (from Hansen et al. 1971)