Hello! Let me explain what geomagnetically induced current is like you're 5 years old.
So, have you ever seen how sometimes the lights in your house flicker or go out during a thunderstorm? That happens because of something called lightning. Lightning is very very hot and powerful and it can create a special kind of electricity that can move through the air and into things like power lines and electrical systems.
Now, sometimes a different kind of electricity can also happen because of something even bigger than thunderstorms - the sun! The sun is a huge star way far away from us, but sometimes it has a kind of explosion called a solar flare or a coronal mass ejection. These explosions send out a lot of different things like light and radiation and also particles that can come all the way to Earth.
When these particles from the sun come into contact with our Earth, they can create something called a geomagnetic storm. It's like a big space storm that you can't see or hear, but it can affect things on our planet like the way our magnetic field works. Our planet has a big invisible magnetic field all around it that helps protect us from all the crazy space stuff out there, and it's also how compasses work.
When a geomagnetic storm happens, it can make the magnetic field around our Earth shake and wobble a little bit. It's kind of like when you shake a jigsaw puzzle and all the pieces move around. When the magnetic field shakes, it can create a kind of electricity called a geomagnetically induced current. This electricity can flow through things on or near the Earth's surface like power lines and pipelines, and it can make them act really weird or even break.
So basically, geomagnetically induced current is a kind of electricity that happens because of a space storm, and it can mess with things on our planet like power lines and pipelines. But don't worry, scientists are always studying this stuff to try to keep us safe!