Comment Section

Low Beta, some enhancement of the magnetic field. Weak event, if it is a CME at all, rapid 180 degree change in magnetic phi could mean HCS. There is no clear CME in the HI data for STEREO, with one possible event entering the HI-1 FOV late on the 4th/early on the 5th (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.