I'll leave it to you to find the paper, but this has been done experimentally and the results measured. https://www.npr.org/sections/krulwich/2010/07/01/128170

I'll leave it to you to find the paper, but this has been done experimentally and the results measured. https://www.npr.org/sections/krulwich/2010/07/01/128170775/a-very-scary-light-show-exploding-h-bombs-in-space https://www.npr.org/sections/krulwich/2010/07/01/128170775/a... > Code-named "Starfish Prime" by the military, it literally created an artificial extension of the Van Allen belts that could be seen across the Pacific Ocean, from Hawaii to New Zealand.