Are there any natural phenomena on Earth that involves supersonic speeds, other than volcanic tephra and meteoroids?
Edit: By natural I mean not man made like airplanes, rockets, missiles, bullet, etc.
Thanks for the answers. What I first had in mind was a macroscopic body relative to its immediate surrounding. If we're going down to atoms level, I think most of the atoms and all electrons wiggle at supersonic speeds (one could even ask if there any elementary particles that travel at subsonic speeds). Sorry I wasn't clear the first time.
And look at MSalters comment as well