They were usually with several fast current pulses or return strokes,all lowering negative charge from cloud to ground.The peak current ranged between kiloampere and tens of kiloamperes.

• 结果表明：触发闪电均是在负地面电场情况下成功的，大多含有多次快电流脉冲或回击过程且都中和了云中负电荷，峰值电流在几千安到几十千安之间。