On February 10, 1991, the CRRES spacecraft measured substorm related E- and B-field variations and high energy particle fluxes at r ∼ 5 R_E and 22h MLT at the magnetic equator. Just following the substorm onset, a few strong (∼ 2 mV/m) pulses of westward E-field appeared at CRRES, well before any large effects on particle fluxes and magnetic field. These pulses occurred simultanously with the onsets of energetic plasma injections at 6.6 R_E (LANL data). Thus the impulsive electric field propagated inward from the current disruption region very fast, possibly as a fast magnetosonic wave. After ∼ 6 min delay from the substorm onset, a complicated pattern of nondispersive energetic particle injection and signatures of magnetic field dipolarization appeared at CRRES location. We interpret this pattern as a two-layered spatial configuration transported inward approximately at the convection speed. The first layer consisted of mostly high energy (> 100 keV) protons whose diamagnetic effect explains the observed magnetic field depression (the so-called Explosive Growth Phase signature). It had a thickness of about a few proton gyroradii. The second (adjacent) layer was characterized by magnetic field dipolarization and increase of energetic electron fluxes. Utilizing the multipoint multi-instrumental observations, we specified the radial distribution of particle fluxes and magnetic field to compute the particle flux variations resulting from the inward convective transport.