Events on day 13 (13 January) 1999. From top down are the solar wind velocity (Vsw), density (Nsw), ram pressure (Psw), temperature (Tsw), plasma β, magnetic field magnitude (Bo), the Bx and By components (in the same panel) and Bz in GSM coordinates. The bottom four panels are the SMU and AU (in the same panel), SML and AL (in the same panel), SYM-H and Dst (in the same panel) and the GIC intensities. In the solar wind/interplanetary and geomagnetic indices panels, blue and black curves show 1 min and 1 h resolution data, respectively. The vertical black dashed line indicates the time of the interplanetary shock.