HIGH ENERGY PROTONS. “Free protons occur occasionally on Earth: thunderstorms can produce protons with energies of up to several tens of MeV.”
https://en.m.wikipedia.org/wiki/Proton
HIGH ENERGY PROTONS. “Free protons occur occasionally on Earth: thunderstorms can produce protons with energies of up to several tens of MeV.”
https://en.m.wikipedia.org/wiki/Proton