The strength of an EMP pulse is the inverse of the radius cubed. 1/r^3 Which means that the power of the electromagnetic (light) pulse dramatically declines as the distance from the blast increases.
A big EMP pulse (explosion) probably has an effective damaging radius of about a mile. Any more distance and the EMP pulse is little more than a normal power spike that the transformers can easily handle.
The above physics is why no one tries to use a Nuclear EMP strike.
The strength of an EMP pulse is the inverse of the radius cubed. 1/r^3 Which means that the power of the electromagnetic (light) pulse dramatically declines as the distance from the blast increases.
A big EMP pulse (explosion) probably has an effective damaging radius of about a mile. Any more distance and the EMP pulse is little more than a normal power spike that the transformers can easily handle.
The above physics is why no one tries to use a Nuclear EMP strike.