“10% of the ATM machines”
OK that is more like it. The damage will not be predictable. Depends on pulse duration, peak impulse, height above ground. And it is a point emitter and distance and incidence to ground will vary with at each point. The idea that you have a cone of destruction that covers 1/3 of the US is nonsense.
Yes, large cities near the pulse source would be a nightmare.
Yup, and would likely deal with the fallout. Now, I don’t care if your city was tapped by the EMP or not. What would be the state of the local population if a nuke popped off within earshot or sight (how could one miss that)? Total chaos, I would think.