The craft hummed loudly, was saucer shaped and had lights that were rotating around the edge.

In the summer of 1978, my foster daughter came into our home VERY excited and wanted us to come outside. I quickly followed her out to the back of the house. I saw an object hovering in the sky nearby. I was amazed because i had never seen anything like this. It was saucer shaped and had lights that were rotating around the edge of the object. It was emitting a deep humming noise that remins in my memory to this day. It vibrated the ground and surrounding buildings. I was not frightened but more awestruck at what I was wittnessing. It remained for quite some time and we stayed and watched it. But the thing that my ex husband didnt remember was that it flew off about a half mile away and began flying in an erratic fashion, that no man made object could match. It was almost a zig zag, back and forth, up and down motion. It was like a housefly moves. It went in this fashion very quickly and erratically. A few minutes later the object left our sight hurriedly.
 Again, i hope this helps you, as i was amazed to hear of your interest in what we saw so many years ago. I feel very special to have been visited by something unexplainable.
Please see other report from the husband for the same location and date.  PD