Multipoint observations by ground-based stations and a fleet of ISTP satellites allowed us to study the plasma processes in different regions of the near-Earth space during a very interesting interval on December 22-23, 1996 which was characterized by ≈20 hour southward IMF B_z and almost constant solar wind pressure ≈ 1.2nPa. Five substorm events were observed during this interval of continuous external driving. Several global effects of these substorms are described. In particular, comparison of measurements in the plasma sheet on both flanks showed (1) the similar loading/unloading processes in the tail correlated with substorm development, and (2) a strong bursty convection concentrated in a narrow (ΔY ≈ 15 R_E) channel. Observations show also that earthward bursty bulk flows (BBF) on both satellites likely coincide with appearance of auroral activity at the footpoints of corresponding satellites but there is no correlation between these flows observed on both flanks.