Comment Section

The compression wave in front of the possible cloud is probably to weak to be a shock though there are some shock like signatures. Strong magnetic field enhancement, but almost all of it is in the x and y directions with very little Bz at all. This may have been a highly tilted CME or one that passed close to the top or bottom of the flux rope. (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.