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The biggest halo coronal mass ejection (CME) since the Halloween storm in2003, which occurred on 2006 December 13, is studied in terms of its solarsource and heliospheric consequences. The CME is accompanied by an X3.4 flare,EUV dimmings and coronal waves. It generated significant space weather effectssuch as an interplanetary shock, radio bursts, major solar energetic particle(SEP) events, and a magnetic cloud (MC) detected by a fleet of spacecraftincluding STEREO, ACE, Wind and Ulysses. Reconstruction of the MC with theGrad-Shafranov (GS) method yields an axis orientation oblique to the flareribbons. Observations of the SEP intensities and anisotropies show that theparticles can be trapped, deflected and reaccelerated by the large-scaletransient structures. The CME-driven shock is observed at both the Earth andUlysses when they are separated by 74$^{\circ}$ in latitude and 117$^{\circ}$in longitude, the largest shock extent ever detected. The ejecta seems missedat Ulysses. The shock arrival time at Ulysses is well predicted by an MHD modelwhich can propagate the 1 AU data outward. The CME/shock is tracked remarkablywell from the Sun all the way to Ulysses by coronagraph images, type IIfrequency drift, in situ measurements and the MHD model. These results reveal atechnique which combines MHD propagation of the solar wind and type IIemissions to predict the shock arrival time at the Earth, a significant advancefor space weather forecasting especially when in situ data are available fromthe Solar Orbiter and Sentinels.

A Comprehensive View of the 2006 December 13 CME: From the Sun to Interplanetary Space