Abstract
The change in electric potential as a result of lightning in a one-dimensional domain is evaluated. Eigenfunctions are used to evaluate the new potential. The change in the electric potential is a constant along the lightning channel, and it is the same as the pre-flash potential outside the channel. The governing equation for the electric potential is obtained from Maxwell's equations.
Acknowledgments
Author would like to thank the reviewers for their comments and suggestions which led to a more precise paper.
Disclosure statement
No potential conflict of interest was reported by the author(s).