It supposes the local ionospheric current redistribution. The key parameter for such phenomenon is, most possibly, an action to the strong E-layer. The HF scattered signals indicate the excitation of artificial field-aligned irregularities. Particle precipitations, stimulated by heating involve the scale of geomagnetic tube. Characteristics of the auroral electrojet, calculated from ground-based magnetometer data have peculiarities associated with heating.
Influence is suspected for the spiral-like disturbances in auroral arc.