What is a MN you may ask? A Micro-Nova, and yes our Star, our Local Yellow Dwarf, is capable of
micro nova. My best research to date is that the micronova itself lasts about an hour, meaning half the world, plus a 1 hour turn would be pretty much fried.
In 1988 they simply called the Micronova a "flash" but they knew of 165 examples at the time.
But I need to say this now, because it is not being said by anyone.
Any area or country with a large percent of Electric Vehicles, will be a much more likely target of EMP and a much more likely invasion target after a conventional CME like the Carrington Event.
Having large amounts of Electric Vehicles put you at extreme risk.