18th October

Solar wind parameters at ACE were indicative of a nominal solar wind
regime. Solar wind speeds were steady in the 400-500 km/s range. IMF
total field values reached 8 nT and Bz reached a maximum southward
component of -7 nT. The phi angle was variable between negative
(toward) and positive (away) solar sectors throughout the period,
suggesting multiple solar sector boundary crossings (SSBCs).

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