I heard it too, directly East from Amelia on or near Cherry Lake(?) Rd. At first I thought it was someone leaving a neighbor's house (they have a 30-something child living there) and was gunning the engine because it was so cold out. When it continued, I went outside and couldn't believe how much louder it was. I also thought it sounded like a plane who's engine was sputtering. Also sounded like a tractor pull. So I called the police & the man said they had gotten several calls from people in our area. Someone thought it sounded like an airboat but why would someone have an airboat out at 1am? Lasted about 15 minutes. I think I'll call the non-emergency police ph# to see if they found out what it was.