Be looking at a 30% chance for M-Class solar flares in the next 72 hours.
CORONAL HOLE: NASA's Solar Dynamics Observatory is monitoring a dark gash in the sun's atmosphere--a coronal hole. It's the dark vertical feature in this extreme UV image taken on Jan. 13th:
Coronal holes are places where the sun's magnetic field opens up and allows the solar wind to escape. This yawning hole is about 120,000 km wide and more than a million km long. Solar wind flowing from its UV-dark abyss will reach Earth on Jan. 16th or 17th, possibly sparking auroras for high-latitude sky watchers.
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