As you blow up the balloon all of the dots move away from each other. If you were on one of these dots you would see everything move away from you. If everything is moving out, then it must have all been in the same place at one time about 15 billion years ago. I don't really know. The physics which talks about cramming the whole universe into one spot gets pretty complicated, and ideas about it are evolving as new things are learned.
Ozone is a chemical made of three oxygen atoms.
Earth quakes don't really affect the upper atmosphere where ozone hangs out. We went out on the river on Tom's snowmachine. Norman and I rode on the back of the sled and we almost fell off. We dug a deep hole and me and Norman helped make the hole. We got cold and ran around.