Detection of lightning superbolts

Unusually intense lightning strokes have been observed by optical sensors on the Vela satellites. These lightning flashes are over 100 times more intense than typical lightning. The lightning superbolts are characterized by optical power in the range of 10¹¹-10¹³ W, have a duration of the order of 1 ms, and have a total radiant energy greater than 10⁹ J. In conjunction with sferics data the Vela trigger rates indicate that about two lightning flashes in 10³ exceed an optical power of 10¹¹ W and five flashes in 10⁷ exceed an optical power of 3×10¹² W.