Observation on Final Jump of the Discharge in the Experiment of Artificially Triggered Lighting

The final striking discharges to a power line or to the ground were observed from near site in the experiment of triggered lightning with rocket in winter of Japan. The leader stroke propagated downwards apart from the grounded wire trailed by the rocket with branching and bending in every stepping point. The final striking distance was related to the peak discharge current comparing with the curves in the literatures.