Fig. 6
From: History and development of coronal mass ejections as a key player in solar terrestrial relationship
The 1979 July 3 CME observed by Solwind (left) and the IP shock driven by an ejecta observed on July 5 by the HELIOS-1 spacecraft (right). Tp, Np, and Vp are the plasma temperature, the density, and the flow speed of the solar wind. The approximate time of the IP shock and the extent of the ejecta are marked. Note that the ejecta marks the region of low proton temperature (Gosling et al. 1973). Helios-1 was above the west limb of the Sun, so the part of the CME remote-sensed by Solwind was intercepted by HELIOS-1, thus making it possible to study the slowdown of the CME between the Sun and 0.84 AU