17 March


Solar wind speed at the ACE spacecraft generally declined over the past
24 hours, beginning the period near 360 km/s with speeds approaching 300
km/s by period’s end. Phi was predominantly positive (away) with brief
intervals of negative (towards) orientation between 17/0530 – 1000 UTC.
The Bz component was mostly positive to +2 nT with a brief negative
period between 17/0809-1007 UTC, but never dipped below -2 nT. Bt ranged
between 1 to 3 nT.

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