2 TYPES OF LIGHTNING DISCHARGES TO A HIGH STACK ON THE COAST OF THE SEA-OF-JAPAN IN WINTER

To clarify the characteristics of lightning on the coast of the Sea of Japan in winter season, the current waveform and the progression of l ightning discharge to a high stack were observed. Observation results from 1989 to 1994 show that; (1) There are two types of lightning disc harges; One with large currents and strong luminosity in the lightning path, and the other with small currents of long duration and weak lum inosity of lightning path. (2) The parameters of lightning currents of the two types of discharges are quite different. (3) There is a quant itative correlation between the change of luminosity in a lightning pa th and the lightning current waveform.