"Scalar Electromagnetics:When two or more Tesla coils are run in close proximity to each other, they tend to create pockets of higher and lower energy where the Hertzian waveforms intersect.One way to visualize this energy is very comparable to ripples on the surface of a pond -- where the ripples meet each other, they will create an isolated "peak" that has more energy than either of the two ripples that contributed to it."
Gurnee, Illinois. Somewhere in Iowa. Gurnee, Illinois.
These photos were taken in different years.
A painting by John Currin.