Coronal Mass Ejections and Active Prominences Relationship During Solar Cycle 23

We report the results of a statistical study of the association between active prominences, observed in microwaves by the Nobeyama Radio Heliograph, and coronal mass ejections, observed in white light by LASCO/SOHO. We found that 6.4 % of the observed CMEs are related to active prominences. This low association is due to the differences between the instruments (ground and space based); and the fact that CMEs are related not only to active prominences but also to flares and filaments. On the other hand, we found that only 24.7% of the active prominences are related to CMEs. We suggest that this low association number is due to the poor determination of the CME source region.