How Do Volcanoes and Earthquakes Work on a Flat Earth?

We still have a ton of questions, but i want to start pulling it all together. So we're going to try and do them nice and piffy. How does the radio experiment prove that the earth is a globe? What's on the other side of the world? If the earth is flat, it's in my video. It's a shame to pom sped it up so fast. There could be an underworld. In't watching too much Piras to cure erbian. Thank o.