<p>An X1.6 flare (in the largest category) erupted (Jan. 27, 2012) along with a coronal mass ejection from the same active region that sent a cloud of particles towards Earth a few days earlier. Since the active region had rotated to the edge of the Sun, the eruption was observed nicely in profile.
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Earth experienced an S-1 radiation storm caused by the protons that must have originated in the northern latitudes but from an area that faced more towards Earth. The bright coils that emerge after the flare are called post coronal loops wherein the region's magnetic field is reorganizing itself.
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