16 December

Solar activity was low. Region 1917 (S15W44, Ekc/beta-gamma) produced a
C3/Sf flare at 16/0330 UTC, which was the largest event of the period.
Newly-numbered Region 1927 (S25W67, Cao/beta) developed rapidly
overnight while Region 1917 continued to exhibit minor growth. The
other regions on the disk were either stable or undergoing minor decay.
No Earth-directed coronal mass ejections (CMEs) were observed.

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