... Future seminars . P a s t seminars . Seminar council . ... D.I. Iudin ( Radiophysical Research Institute, Nizhny Novgorod ) . ... We consider dynamic percolation effects on the base of a cellular automaton model on tree-dimensional lattice. ... We assume that such a fine scale spark discharge can initiate breakdowns of the neighbouring lattice bonds ("infect" the neighbours), if the potential difference between the cells exceeds some activation level, which is less than critical one. ...