Radiation characteristics and scaling law of seismo-electric field

Electric field around a crack in rock is generated by the appearance and subsequent disappearance of charges on a newly created surface. This electric field occurs here and there along a fault plane. We record it as one of seismo-electromagnetic phenomena (SEP). In a simple case, the maximum of the field is proportional to the surface charge density and the total real contact area of a fault plane. A new scaling law between the maximum of the seismo-electric field and the earthquake magnitude is obtained based on the fractal distribution of fault asperities. It can support the VAN group´s statistical scaling law.