EMERGING SUNSPOT: On July 19th, a region of high magnetic activity rotated over the sun's southeastern limb. Extreme UV telescopes on the Solar Dynamics Observatory (SDO) recorded these plumes of hot plasma heralding the approach:
White-light images of the emerging regionsubsequently revealed the dark cores of a large and complex sunspot, newly numbered AR1089. UPDATE, JULY 20 @ 1400 UT: The sunspot is now growing even larger. It has a restless magnetic field that is crackling with B- and C-class eruptions. Readers with solar telescopes are encouraged to monitor the region as it turns to face Earth.
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