According to the whispers I see on the net (of course you know everything is true on the net) this is likely a satellite killer they are talking about. I'm guessing it would be the EMP they would be using to scramble the satellites and turn them into junk. Which would take out early warning systems.

It seems to me someone doesn't really care if they survive this if that's the plan. In 1962, the US tested a 1.4 megaton fusion bomb in space. It lit the whole sky from Hawaii to New Zealand during the night as particles hit the upper atmosphere from the detonation and created an artificial aurora. It was exploded at a height of 250 miles and the result turned the night time sky into day. The EMP, knocked out radio stations and killed street lights in Hawaii. The project was called Starfish Prime and it was a test to see what would happen to the Van Allen radiation belts when a nuclear blast happened.

The blast created a new radiation belt that was stronger and more long lasting than what was predicted. It lingered for 10 years and destroyed two satellites in the process.

The problem with upsetting the Van Allen Belts, which protects the earth from solar radiation, which is what Starfish Prime did over a long lasting time period, is that if the sun fires a major geomagnetic storm during this time, the earth isn't as well protected.

The Carrington event, which was one of the strongest geomagnetic storms on record, occurred in 1859. It gave telegraph operators electric shocks. We have more concerns now than when the Carrington event happened. What exists now that didn't then is computer chips and they have been integrated into near all machines and for control and data retrieval purposes. A storm of such caliber during that 10 year span, would set civilization back globally.