Electron density map of the solar corona produced from AIA and LASCO C2 observations (Zucca et al. 2014). A density profile of the corona for the data of the event was produced by averaging the density as a function of radius between the lines at position angles of 90° and 135°. This density as a function of radius was used in deriving electron beam kinematics from the herringbone radio burst statistics. The inner and outer black points represent the heights at which 43 MHz (0.47 R_⊙) and 32 MHz (0.59 R_⊙) are expected to occur.