Figure 2

Solar wind speed, solar wind density, IMF Bz, and 1-h averaged SYM-H for the November 2004 storm. The bottom panel also includes 1-h SYM-H derived from the original Burton’s model (blue line) and 1-h SYM-H derived from our extended Burton’s model (red line). IMF, interplanetary magnetic field; Bz, the Z component of the magnetic field; GSM, geocentric solar magnetospheric; SYM-H, symmetric disturbance field in the horizontal direction.