Figure 3. Current at the base of 1st column for a strike to ground and strike to elevated object at a distance 30 m from the building (a) For velocity of propagation of lightning current equal c/3(velocity of light) (b) For velocity of propagation of lightning current equal to c

From

A Comparative Study on Induced Currents in Steel Reinforced Building Due to a Nearby Lightning Strike to Ground and a Strike to Nearby Elevated Object

Vishwanath Hegde, Vinoda shivanand

American Journal of Electrical and Electronic Engineering. 2014, 2(1), 1-5 doi:10.12691/ajeee-2-1-1