21 January


Solar activity was low. The largest solar event of the period was a
long-duration C3/Sf flare that began at 20/2139 UTC, reached its max at
2249 UTC, and ended at 20/2357 UTC. The flare originated from newly
numbered Region 1963 (S06E62, Dao/beta) as it rotated onto the visible
disk. An associated, asymmetric, partial halo coronal mass ejection
(CME) was first observed in Lasco C2 imagery at approximately 20/2212
UTC. Initial analysis indicated the bulk of the ejecta had a mostly
eastward trajectory, with only a portion of the shock possibly headed
towards Earth. Further analysis will be accomplished to determine timing
and magnitude, if any, of any impact to Earth. Region 1959 (S24E39,
Eai/beta-gamma) produced the only other notable event, a C1 flare at
20/1800 UTC. This region maintained its beta-gamma magnetic
configuration as mixed polarities were identified in both the
intermediate and trailer spots. The remaining seven numbered regions
remained either stable or exhibited signs of decay. A narrow CME was
observed in SDO/AIA 304 imagery at 21/0214 UTC and Lasco C2 imagery at
approximately 21/0224 UTC. Ejecta associated with this event appeared to
originate from just beyond the west limb, with little to no impacts on
Earth expected.

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