well, if it's that much energy you be way too close to a low resistance section of the crust

i'm gonna start thinking about how that can be estimated

i'd guess that since in general thunderstorms are electrons coming down from clouds, that were seeded by those electrons negatively charging dust, that a historical map of lightning strikes would help avoid a likely patch where a giant zap could erupt suddenly after way too much energy comes from a CME

there's probably some kind of electrical resistance value that you can map to different soil types as well, and then from that make a heat map of potential lower resistance areas of the surface to avoid