  We show theoretically that anisotropy of electronic distribution function
inside the laser-irradiated metal leads to the formation of edge currents at
the timescale of distribution isotropization. When the electronic pressure in
the skin-layer is anisotropic, pressure gradient appears to be non-potential
force effectively producing low-frequency magnetic field. In typical
experiments with femtosecond laser pumping generated internal magnetic field
can rich magnitude up to ~1 Tesla in non-damaging interaction regime. We
demonstrate that this field is localized inside the metal, while just a minor
part of its energy can be radiated into free space as a sub-terahertz signal.
