COMPARISON WITH DATA CMEs: Use magnetic neutral line or H filament to estimate S f ; Z LE = Z + 2a EPs: S f = S p + 2a f Z p = Z – a 4 CMEs (LASCO) 13 EPs (radio, H ) Chen et al., ApJ (2006) EP data CME data A quantitative test of the accelerating force and the geometrical assumptions A quantitative challenge to all CME models
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