As a key on-disk proxy of coronal mass ejection (CME), bipolar double dimmings (BDDs) during eruption of filament or coronal sigmoid are explained to mark footpoints of a flux rope. One thus expects the configurat...
A catalogue of type II bursts and the associated coronal mass ejections (CMEs) observed by the solar and heliospheric observatory (SOHO) mission is used to select the twenty three CMEs events with CME speed equal ...