Defining a CME:
SOHO/LASCO/C3 Images
FRONTAL
CORE
CAVITY
                 Corona before CME                       Corona with CME
 Most of the radio observations below the occulting disk;  except                   Wind/WAVES & BIRS  (but no imaging)
White light CME observed by SOHO/LASCO C3 coronagraph on 2000 February 27 at 07:42 UT.  Left: Pre-event corona.
The dark circular disk:  Occulter
Small white circle: Optical Sun