Weird noise

"Hey, it's a nice night....It's one of the last ones.  I mean, that low rumble you hear? It's winter.  It's only about a mile away."

I just read this in "The Snow Queen" by Michael Cunningham.  He and I think you heard winter.  So that's depressing.

That's cool -- (HA) -- maybe I need to read this book!

I can hear that too. Not sure, but I think I've heard it before... Just some of the random noises that now and then emit from industrial Duluth and the shipping areas.

I live a bit north of town, and every once in a while I can hear a train lumbering about somewhere to the southwest.  I can typically hear it for about 20 minutes or so before it fades out of town.

I have been hearing that same noise at the same time, but I live further inland, almost a mile up 54th from Superior St. At this distance, I assumed it was a train. They often move freight cars up and down those tracks late at night and I was thinking that was what I was hearing. If you are closer to the tracks and don't think it is a train, then it must be something else. I have heard the noise a lot lately, so whatever it is seems to be on some sort of schedule.

People I know on Park Point said dredging is going on..in harbor.

Probably the Navy testing the weaponizing of freshwater fish. Or I just made that up.