Comment Section

It is difficult to see a lot in the heliospheric imagers corresponding to this event. My best guess is that, if there is a CME driver for this event, it is a plasma blob that can barely be seen in COR2A late on the 10th, and it takes more than a full day to accelerate out of the COR2 field of view. It was very faint and weak in LASCO (The blob was so weak none of the SEEDS algorithms detected it in any instrument). After taking more than a day to get out of COR2, it picks up enough speed to reach the Earth in less than 2 additional days. The blob may have been accelerated by another CME that occurred on the 12th. (Hess)

Image 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.