EMP bombs have a wide range of functions. When an EMP with the equivalent of 1 10,000 tons explodes at an altitude of 400 kilometers from the ground, the killing radius can reach 2,200 kilometers, especially "pervasive": it can enter the equipment through pipes, rails, air holes, cables, terminals and antennas.

1On June 9, 1962, the United States exploded a1.4000-ton nuclear warhead 500 kilometers above Johnston Island in the Pacific Ocean, resulting in a large-scale power outage, telephone interruption, radio failure and various electronic instrument failures on Oahu Island, Hawaii, which was 1280 kilometers away.