The subject of EMP isn’t covered in the mainstream press very often. And while The Economist isn’t exactly mass-market, it isn’t fringe either. The disaster that could follow from a flash in the sky
Electromagnetic Pulse (EMP) is an effect of nuclear weapons. Detonate a nuclear bomb high in the atmosphere (40 km or so) and the result of pumping large amounts of gamma rays into the ionosphere is an EMP. Other things can generate similar effects on varying scales.
EMP: The Potential Disaster That Gets Ignored | 357 Magnum
Congress will have failed us when the inevitable occurs. Be prepared.