View source for 12/21/2014 18:30:00 UTC

=Comment Section=
*Pretty clear shock signature on the 21st along with what looks like a very strong shock on the 23rd, with another possible shock in between the two. The magnetic field shows signs of rotation, indicating a possible magnetic cloud. The high velocity following the event could mean that some of these signatures are CIR related. My initial thoughts are that this was a CME being pushed by a fast speed stream with a CIR compressing the flux rope (Hess)

=Image Data=
A combination of SWEPAM and MAG data from the ACE Satellite: <br />
[[File:plot_sw_mag_plasma_2014122100.png|350px]]
[[File:plot_sw_mag_2014122100.png|400px]]
[[File:plot_sw_vel_2014122100.png|350px]] <br />
The blue lines are an approximation of the CME cloud and the red line denotes the shock.

=Video Data=

=References=