Fig. 2From: Substorm and pseudo-substorm Pi2 pulsations observed during the interval of quasi-periodic magnetotail flow bursts: A case study(a) The auroral electrojet indices AU and AL on 26 October 1997, 1100–1600 UT. (b) Kakioka (KAK) magnetometer data. (c) Pi2 power in the Pi2 frequency band (6–25 mHz) of the differenced KAK H. (d) Filtered (5–30 mHz) KAK H. A through H indicate events selected for analysis. KLT indicates the KAK local time.Back to article page