18th October

Solar wind parameters, measured at the ACE spacecraft, indicated a return to ambient conditions. Speeds steadily dropped from near 450 km/s at the beginning of the period to the current speeds of just under 370 km/s. IMF total field was again steady around 4 nT, while IMF Bz leveled off to end the period near zero. The IMF Phi angle remained at a positive (Away) orientation throughout the period.

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