The WOW signal... impressive that anyone even remembers it at this stage. This sent me back into my moribund Drake Equation and SETI files. I thought I'd find my references quickly, but have not; so you'll have to put up with memories et al.
Drs. John Kraus and Robert Dixon, radioastronomers, were operating the OSU [sorry Buckeye haters] radiotelescope called the "Big Ear". They were doing generic radio signal searches, not specifically aimed at SETI --- in those days finding new pulsars or other high energy sites was a good thing.
On the evening of August 15th, a graduate student, now-Dr. Jerry Ehman, was baby-sitting the telescope. When he checked on the paper recorder there was an extremely powerful "signal excursion" which looked suspiciously like just what they were looking for. He wrote on the margins of the tape, "WOW!".
This signal lasted 72 seconds, coming apparently from a specific direction in space. Kraus and Dixon were impressed. They checked and rechecked that point in space, but the signal never returned. They applied all their imagination to ways in which a false signal could explain this, but nothing came anywhere close to doing so. They were left with an enigma: something which looked just as if the Big Ear had been aligned with a powerful radio source, which, if a beam, shifted away, or if a spherically radiating source, moved on. Either way, the chance that this was technology rather than Nature remained.
Partly inspired by this, John Kraus began publishing, in 1979, a now rare journal entitled Cosmic Search. All the big hitters published there and Notre Dame's Theodore Hesburgh was on its board of editors. This is where I thought that I'd find my original reference, but didn't.
Now, just to spice this up, I'll tell you something almost no one else knows. You can decide if it relates. On that same evening, a friend of mine in Mt. Vernon. IN was operating his magnetic field detection system. He is an explorer type engineer and was just trying to see if he could ever get an excursion simultaneously with someone reporting a UFO in the vicinity. He was watching TV when noise from his system told him that the equipment was measuring a magnetic field excursion. IF the time can be nailed down exactly, it appears that the magnetic signal occurred simultaneously with Kraus' radio signal.
If these two signals are from the same source, the data would match a strong-emitting object in near-Earth orbit or closer, which then moved on.
As with all these mysteries, one cannot claim anything like certainty in one's theorizing. What one SHOULD take from them is the humility to keep a respectful silence about subject matter where one has no idea what one is talking about. There is much more to the framing data, sociology, and informed opinion surrounding this... but that is another book.