(A, B) Composite radio image combining data from the WIND spacecraft and various spectrographs, showing type II and type III radio bursts. Below are the locations of the radio sources and the reported times of associated CMEs. (C, D) Radio signatures measured by the STEREO spacecraft. STEREO-A measured the strongest signatures, due to the fact that the shock propagated in the direction of that spacecraft. Images taken from http://radio-monitoring.obspm.fr/.