The black hole in the center of Earth is one of the classic hoaxes

   

Earth cutaway

The black hole in the center of Earth is one of the classic hoaxes

Is there a black hole in the nucleus of Earth? The fact is that there are no visible black holes, and that means that the people, who are writing about things like black holes on the planet Earth are just kidding. But there might form the quantum-size short-living black holes on Earth and another universe. 

Those black holes are existing less than a nanosecond, and that thing means that there are meanless black holes all around us. But there is (probably) no stable black hole, which has an effect on us in the nucleus of Earth. And that makes this article at least partially hoax(1). So don't swallow it without biting first. 

But there is a theory that in the brightest and hottest stars would be a small black hole, which gives them energy. The high energy level, what a tennis ball to a basketball-size black hole would make would explain the brightness and extremely high surface temperature of the stars like Spica. 

There is a possibility that in the nucleus of some planets can form a black hole. But that thing can happen when the star what that planet is orbiting is exploding as a supernova. In this case, the radiation of the star is impacting the core of that planet. And then it would conduct to the nucleus of the planet, where it can form a small-size black hole. But the thing is that this kind of cases require more massive energy impulses than the sun can form. 

But when we are thinking about the universe, that thing would make this theory partially true is that the quantum-size black holes are forming all the time in the universe because of high energetic reactions. The thing is that those small black holes are things, that can pass the radiowaves through them.

Could that tiny black hole turn stable, and crush the planet Earth? The fact is that there is a possibility that the energy pump in the quantum black hole would rise its mass and size. Then that thing could cause the end of our planet. But those things are only theories. 

Sources:

(1) https://www.google.com/url?q=https://www.popularmechanics.com/science/environment/a34166354/black-hole-center-of-earth-fake-study/&source=gmail&ust=1601558760301000&usg=AFQjCNFw2JaX6I-WvGdChydezuM_7aRj1Q

Image: https://www.nasa.gov/mission_pages/sunearth/news/gallery/earths-dynamiccore.html