16th October

Solar wind parameters, measured at the ACE spacecraft, were indicative of coronal hole high-speed stream (CH HSS) influence. Speeds did, however, show signs of waning CH HSS effects, as they ranged from near
580 km/s at the beginning of the period to just over 480 km/s by the end of the period. IMF total field held steady at approximately 4 nT, while IMF Bz intermittently dipped southward as low as -4 nT. Phi angle
remained in a mostly positive (Away) orientation throughout the period.

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