10/24/2011 17:38:00 UTC
Comment Section
I believe this is a complex event, caused by a merger between a partial halo CME on October 21 and the shock wave of a CME at the North Eastern Limb on the 22nd. I believe the halo CME was propagating towards the Earth, then the shock wave caught the CME front and accelerated it faster.(Hess)
Image Data
In-Situ Data
A combination of SWEPAM and MAG data from the ACE Satellite:
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The blue lines are an approximation of the CME cloud and the red line denotes the shock.