Origin of "The Wave"

Anybody know the origin of “The Wave”, where everybody stands up in turn at sporting events to make a big “wave” that rolls around the stadium?

Who started it? When is the first recorded instance of it?

And why do people keep doing it?

No cite, but I’m pretty sure it started at the University of Washington back quite a while ago (70’s, maybe?). Now we can wait for someone who either (a) knows or (b) has the patience to do a websearch on “the wave” to provide the definitive answer… :slight_smile:

Discussion here that supports theory that it originated in US football games in 1981. Even a few claimants to the title of inventor