"For reference, 1 exa-electron volt equals 1 billion gigaelectron-volts, and 1 gigaelectron volt is 1 billion electron volts. That would make the Amaterasu part

"For reference, 1 exa-electron volt equals 1 billion gigaelectron-volts, and 1 gigaelectron volt is 1 billion electron volts. That would make the Amaterasu particle 244,000,000,000,000,000,000 electron volts. By comparison, the typical energy of an electron in the polar aurora is 40,000 electron volts". Also summarized by CNN [1]. [1] https://www.cnn.com/2023/11/23/americas/powerful-cosmic-ray-amaterasu-particle-detected-scn/index.html https://www.cnn.com/2023/11/23/americas/powerful-cosmic-ray-...