LARGE CORONAL HOLE TURNING TOWARD EARTH: A large hole in the sun’s atmosphere has formed and it is turning toward Earth. NASA’s Solar Dynamics Observatory took this extreme ultraviolet image of the structure on Dec. 3rd:
This is a “coronal hole”–a region where the sun’s magnetic field has opened up, allowing solar wind to escape. A stream of solar wind emerging from this coronal hole could reach Earth as early as Dec. 7th and influence the near-space environment of our planet for several days. G1-class geomagnetic storms and high-latitude auroras are possible when the solar wind arrives.