Quote Originally Posted by oldblue View Post
eh yun EMP gun totoo ba talaga may ganun satellite that will bring us all back to the stone age
EMP has been touted as a potential anti-satellite weapon. EMP is already well known as a side effect of a nuclear explosion and how it could fry electronics. Of course, many military hardware such as armored vehicles and aircraft had already been hardened to withstand EMP.

I'm not sure how practical an EMP gun will be. It'll probably be very localized.
To have an effect on a worldwide scale, it'll have to be at the same magnitude as a solar flare. We've already seen the nasty effects of a solar flare on telecommunications and power grids.