Observation of ground potential rise caused by artificially-triggered lightning

Comparative analysis was made between the ground potential rise resulted from an artificially-triggered flash, the channel base current and close magnetic fields. The results indicated that the current peaks of the two strokes in artificially-triggered flash were 41.6 and 29.6 kA. The inferred currents, based on the close magnetic fields, were about 39.8 and 29.1 kA, in agreement with the measured ones. The ground potential rises caused by the two return strokes were about 302.8 and 141.3 kV, respectively. The downtime and half-peak width of the ground potential rise were much longer than that of the corresponding value of the channel base current. Moreover, characteristics of the ground potential rise were studied by using ATP simulation.