Yes. However I don't know if that is different. That is a roaring fire, whereas the https://en.wikipedia.org/wiki/Tsar_Bomba was a 58 megaton event which would have created a pulse. Electronic devices can sit in the sunshine all day, exposed to the roaring fire of the sun but a singular EMP can take them out? When you look for things, you look for what is different to its surroundings. Even when our own people are looking for planets around other stars, they are looking for an incredibly small change. They found something nearly 30,000 light years away like that.
Yes, we're close enough to Earth that it has a lot more affect on us than the Sun. And the Earth has a magnetic shield. Etc.
The Tsar Bomba did not destroy all life on the planet, did it? A simple solar flare is 5 to 10 magnitudes larger. Yes, small changes, but small changes that don't belong.
We are close enough to the Sun that even if that were detectable at the scale of the cosmos, the distance between the Earth and the Sun is a rounding error at the scales we are talking about.
Appreciate this. We are effectively in the Sun's atmosphere. The entire solar system is. Scale matters.
