An EMP doesn't just take out the entire planet. It would be still very localized and would only take out everything in a round cone shape beneath the EMP detonation. It would not neutralize the entire planet all at once.

In the 60s the government tested this with I think something like a 3 Megaton blast near hawaii, and it caused quite a bit of havoc but, and EMP capable of taking out the whole planet would be many times larger than the largest nuclear weapon we have ever created.

Edit: i asked GPT

The test you're referring to is likely the Starfish Prime test conducted by the United States in 1962. This was a 1.4 megaton nuclear explosion detonated 400 kilometers above the Pacific Ocean, near Hawaii. The EMP from this test caused disruptions to electrical systems over 1,400 kilometers away, including damage to satellites and electrical infrastructure in Hawaii, but it was far from global in impact.To affect the entire planet with an EMP would require a massive and highly coordinated series of detonations, far beyond our current capabilities.

An EMP doesn't just take out the entire planet. It would be still very localized and would only take out everything in a round cone shape beneath the EMP detonation. It would not neutralize the entire planet all at once.

In the 60s the government tested this with I think something like a 3 Megaton blast near hawaii, and it caused quite a bit of havoc but, and EMP capable of taking out the whole planet would be many times larger than the largest nuclear weapon we have ever created.