Response of the auroral oval precipitation and magnetospheric convection to changes in the interplanetary magnetic field

High-latitude observations on January 18, 1984 during the first GISMOS campaign are examined. An intense substorm occurred after a long period of quiescent geomagnetic activity when the IMF decreased gradually over a 2-hour period from +5 to -8 nT. This present study investigates how the auroral precipitation boundary, the energy flux, and the convection respond to this change from quiet to active conditions.