What's the range of that pulse, and how does it relate to the field strength map seen on Wikipedia (https://commons.wikimedia.org/wiki/File:EMP_mechanism.png ht

What's the range of that pulse, and how does it relate to the field strength map seen on Wikipedia (https://commons.wikimedia.org/wiki/File:EMP_mechanism.png https://commons.wikimedia.org/wiki/File:EMP_mechanism.png)? Naively, this map makes me think that a single such EMP means enough electronics break that every major power plant or industrial plant is down and not recoverable for weeks.