Comment Section

Rotation of B in y and z directions. Data gap in density, another event with rapid change in phi, could be HCS. Clear shock signatures, in B, T, N and V. The only possible CME in STEREO enters HI-1 FOV on the 24th, but whether or not this event would reach the Earth on the 27th is unclear. (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.