23rd November

Solar wind speed was generally in the low to mid 300 km/s range at the
ACE spacecraft. A weak transient passage may have occurred after 22/0736
UTC when the phi angle abruptly changed from negative to a more positive
orientation, Bt jumped slightly and Bz became entirely positive. During
this episode, temperature dropped slightly and density rose. By about
22/1625, Bz had become negative (approx -2nT) and began to rise

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