Modelling earth current precursors in earthquake prediction

A basic theory for a detailed interpretation of earth current anomalies in earthquake prediction studies is presented. We have also suggested a possible field technique for a complete assessment of the information carried out by the recordings. The mapping approach seems to be an adequate tool for contouring the focal area, under the assumption that a nucleus of polarized charges is activated in a limited volume of the subsoil in conjunction with growing dilatancy in locally stressed rocks.