9th November

Solar wind parameters, measured at ACE, indicated the arrival of the
anticipated positive polarity coronal hole high speed stream (CH HSS).
Solar wind speed began the period ranging from 375 – 430 km/s. At
approximately 09/0450 UTC, speeds began a steady climb to near 470 km/s,
temperature and density increased simultaneously, and the phi angle
began changing to positive (away) orientation. Total field strength
increased to near 14 nT while the Bz component dropped to -14 nT. By the
end of the period, speeds had reached over 500 km/s and the phi angle
was solidly in a positive (away) orientation.

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