AbstractThe hysteresis transitions between two temperature states of a collisional magnetoplasa due to Joule heating near by the electron gyroresonance are analysed. The propagation of intense extra‐ordinary gyroresonant microwave across the magnetic field in a plasma is responsible for such jump‐like thermic effects, the wave amplitudes being less than the “characteristic plasma field”. The transversal heat conductivity may lead to formation of spatially periodical temperature profiles in the hysteresis region of wave's intensity; the spatial periods of such profiles are much less than the Joule dissipation length of heating wave. The thermodiffusion, stimulated by temperature lamination, may form the spatial oscillations of magneto‐plasma density across the magne