Ozone Production in Nature
Ozone is naturally produced by ultra-violet rays from the sun and lightning-based corona discharge. These two methods account for nearly all natural ozone creation on Earth.
During a lightning storm, oxygen near the ground in the presence of corona discharge creates ozone.
From the sun, oxygen from the atmosphere in the presence of light creates ozone.
Oxygen (O2) is forced between high voltage plates to simulate corona discharge. The oxygen is broken apart and recombines into ozone (O3).