The magnetic structure of the epsilon-Fe.sub.2O.sub.3 iron oxide polymorphic modification is collinear ferrimagnetic in the range from room temperature to ~150 K. As the temperature decreases, epsilon-Fe.sub.2O.sub.3 undergoes a magnetic transition accompanied by a significant decrease in the coercivity H.sub.c and, in the low-temperature range, the compound has a complex incommensurate magnetic structure. We experimentally investigated the dynamic magnetization switching of the epsilon-Fe.sub.2O.sub.3 nanoparticles with an average size of 8 nm in the temperature range of 80-300 K, which covers different types of the magnetic structure of this iron oxide. A bulk material consisting of xerogel SiO.sub.2 with the epsilon-Fe.sub.2O.sub.3 nanoparticles embedded in its pores was examined. The magnetic hysteresis loops under dynamic magnetization switching were measured using pulsed magnetic fields H.sub.max of up to 130 kOe by discharging a capacitor bank through a solenoid. The coercivity Ð.sub.Ñ upon the dynamic magnetization switching noticeably exceeds the Ð.sub.Ñ value under the quasi-static conditions. This is caused by the superparamagnetic relaxation of magnetic moments of particles upon the pulsed magnetization switching. In the range from room temperature to ~ 150 K, the external field variation rate dH/dt is the main parameter that determines the behavior of the coercivity under the dynamic magnetization switching. It is the behavior that is expected for a system of single-domain ferro- and ferrimagnetic particles. Under external conditions (at a temperature of 80 K) when the epsilon-Fe.sub.2O.sub.3 magnetic structure is incommensurate, the coercivity during the pulsed magnetization switching depends already on the parameter dH/dt and is determined, to a great extent, by the maximum applied field H.sub.max. Such a behavior atypical of systems of ferrimagnetic particles is caused already by the dynamic spin processes inside the epsilon-Fe.sub.2O.sub.3 particles during fast magnetization switching.