Electromagnetic emission under uniaxial compression of ice: I. Identification of nonstationary processes of structural relaxation by electromagnetic signals

Discrete electromagnetic emission caused by a jump of plastic deformation and fracture of single-crystal and polycrystalline ice is revealed and investigated. An album of electromagnetic signals is compiled, which makes it possible, on the basis of the electromagnetic-signal shape, to identify and study the kinetics of mesoscopic events of structural relaxation that are related to the dynamics of dislocation pile-ups and cracks.