We study a sample of complex events: each includes a, coronal type II
burst, accompanied by a GOES SXR flare and LASCO CME. The radio bursts
were recorded by the ARTEMISIV radio spectrograph (100-650 MHz range);
the GOES SXR flares and SOHO/LASCO CMEs, were obtained from the Solar
Geophysical Data, (SGD) and the LASCO lists respectively. The radio
burst-flare-CME characteristics were compared and two groups of events
with similar behavior were isolated. In the first, the type II shock
exciter appears to he a flare blast, wave propagating in the wake of a
CME. In the second the type II burst appears CME initiated though it is
not always clear if it is driven by the bow or the flanks of the CME or
if it is a reconnection shock
