[fso301]

A well devised EMP device causes ground current. Even shielded and "grounded" systems can be reached for an event unless they are grounded in a very deep counterpoise design. The ferric nature of the geography dictates the shielding requirements and sometime, possibility or improbability of a defense.

If the electronics of modern automobiles are largely immune to EMP, so too can other electronics be protected.

[trebb]

If the electronics of modern automobiles are largely immune to EMP, so too can other electronics be protected.

I would imagine that a close-range targeted EMP would have quite a stronger effect than a "general" high-altitude type event.