23 December

Solar wind parameters, measured at ACE, were indicative of a nominal
solar wind environment. Solar wind speed slowly decreased from initial
values near 350 km/s to end-of-period values near 300 km/s. Total field
strength values were steady in the 4 nT to 6 nT range while the Bz
component ranged between +4 nT to -4 nT.

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