Perhaps just for comparison, during the discharge (only!) of an average lightning (lasting from 100 to 150 millionths of a second) is above ground, also underground radiated energy, thanks to that would long and loaded freight train (thousands of tons) travel several tens of kilometers, and a full loaded truck (tens of tons) hundreds or thousands of kilometers.
Labda tu kwa kulinganisha, Wakati wa kutokwa (only!) ya umeme kwa wastani (kudumu kutoka millionths 100-150 ya pili) ni juu ya ardhi, chini ya ardhi pia radiated nishati, shukrani kwa Hiyo ingekuwa muda mrefu na kubeba mizigo treni (Maelfu ya tani) kadhaa kusafiri mamia ya kilomita, na kamili ya kubeba lori (makumi ya tani) Maelfu au mamia ya kilomita.