17 December


Solar activity was low. The largest event of the period was a C3 flare
that occurred at 16/2133 UTC. This event was associated with a 16° long
eruptive prominence on the limb (EPL), centered near S36W90. The
resulting coronal mass ejection (CME) was analyzed and determined to be
directed too far to the west to have any major impacts on the Earth.
Newly numbered Region 1928 (S16E16, Dao/beta-gamma) exhibited fairly
rapid growth throughout the period while displaying prominent mixing
within its magnetic structure. The other regions on the disk were either
stable or indicating minor decay. No Earth-directed CMEs were detected
in imagery.

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