>The electromagnetic pulse (EMP) fused all of the 570-kilometer monitored overhead telephone line with measured currents of 1500 to 3400 amperes >The EMP from

>The electromagnetic pulse (EMP) fused all of the 570-kilometer monitored overhead telephone line with measured currents of 1500 to 3400 amperes >The EMP from the same test caused the destruction of the Karaganda power plant, and shut down 1,000 km (620 mi) of shallow-buried power cables And that's a 300kt explosion at 290km altitude, above the middle of nowhere in 60's Kazakhstan. Really puts things into perspective. Such a test would be devastating to the modern infrastructure. Boris Chertok (of Rockets and People fame) also wrote that the radio communication was interrupted by another test in the series (K-5) for about an hour, at the distance of 500km from the test site.