Yesterday I attended a radio class that covered nuclear related EMP (electromagnetic pulse) and sun caused CME (coronal mass ejection). The majority of the information from the class has been covered in some of my prior posts. Look in the categories section on the right side of this page and open the category EMP. This will give you some good insight to the problem.
However in the class, I learned a few new tricks and I will be building some new faraday cages in the next few weeks and posting pictures of them on the blog. The bottom line is that if your electronics are not in a cage, they may be toast.
This includes anything with a chip in it, including LED bulbs. I had never really thought of flashlights being a problem before. This may include night vision equipment.
CME is nowhere near the problem of EMP from a nuclear blast. With CME there would be up to 92 hours of warning. With EMP from a nuclear blast, the warning would be just a few minutes to none. A correctly placed 1.4-megaton nuclear explosion high above the central USA would destroy most of the power grid. We would be back in the 1800’s overnight, but without their technology.
This is a confusing subject and every expert I talk to has a slightly different take on it. Short of making your whole house and garage a faraday cage, I think you have to prioritize your electronics and save the most important.