27 February


Solar wind parameters, as measured at the ACE spacecraft, remained at
background levels throughout the period. Wind speed ranged from an
isolated max of 389 km/s to a minimum of 325 km/s. IMF Bt was in the 2
to 6 nT range, while IMF Bz was variable in the +/-4 nT range. IMF Phi
data indicated a positive-polarity (away) solar-sector orientation
during a majority of the period. An increase in the ACE EPAM low energy
particle data indicates a transient is approaching, which is likely the
CME from Feb 25.

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