This is a comment by John Maynard on the site:
I live in Sanford Florida. Loud rumble in the sky sounded like a gigantic jet engine. Woke my wife and I up and made the dog start growling. After a few minutes and it still hadn’t passed, I said I didn’t think it was a jet. Our house started shaking and I looked out the window and didn’t see anything. After a few minutes it finally passed.
This happened about 5 times in the course of 20 minutes. Finally we went outside to wait for it to happen again and sure enough it did. Sounded like a train/ airplane/ thunder all rolled into one, and got louder as it sounded like it was getting closer to us, yet even when it sounded like it was right over us, we couldn’t see a thing. Clear sky full moon, but nothing visible to account for the noise.
This happened for a total of 45 minutes. I called my mom in the middle of it and asked if she heard anything. She lives 10 miles away in Orlando and I woke her up with my call. She said she could hear a low flying jet and then hung up, but then called me back a few minutes later to say that it still hadn’t passed. She stayed on the phone after that and told me that it kept passing by. We believe she was hearing the same thing as us.
Did you also hear it?