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Near-Sun speed of CMEs and the magnetic nonpotentiality of their source active regions

Tiwari, Sanjiv K.; Winebarger, Amy R.; Venkatakrishnan, P. +3 more

We show that the speed of the fastest coronal mass ejections (CMEs) that an active region (AR) can produce can be predicted from a vector magnetogram of the AR. This is shown by logarithmic plots of CME speed (from the SOHO Large Angle and Spectrometric Coronagraph CME catalog) versus each of ten AR-integrated magnetic parameters (AR magnetic flux…