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Old 08-24-2019, 12:58 AM
 
Location: Dessert
10,895 posts, read 7,389,984 times
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I sometimes notice a deep rumbling noise that I can't identify. It's usually pretty quiet at night; this morning I noticed it between about 5 and 6 am. That made me think it's early commute, but it's rumbling now at nearly midnight on a Friday night.

I'm out in SW Tucson, about 9 miles from the airport and 5 miles from I19.
I don't think there's heavy industry out here, and not that much traffic on surface streets. I used to live much closer to a very busy freeway, and it didn't sound like this.

Any ideas what it might be?

Air Force base? Secret underground city?
Or maybe the rumbling sands someone mentioned a while ago. But that would be all the time, wouldn't it?
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Old 08-24-2019, 09:10 AM
 
810 posts, read 871,229 times
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There was a thread about the rumbling:

//www.city-data.com/forum/tucso...d-outside.html
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