National Lightning Detection Network

Cited as a real-world example of RF detection from electric arcs — 17 U.S. stations triangulate every lightning strike to within 3–5 km and estimate strike current from EMI.

Lightning generates radio frequency too — it's just a big electric arc. We have seventeen stations located around the United States that pinpoint every lightning strike that hits the earth, by picking up the electromagnetic interference. They can tell you how many amps are in that lightning strike. By triangulating from these seventeen stations, they can tell you within three to five kilometers of where the strike hit the ground. It's called the National Lightning Detection Network.