"I don't know about the Intuit people, but the Inuit will probably blame my Newfie relatives and their baked beans.

No problem.
I will list your relatives and the baked beans as a possible cause.

I've also had "The Return of Jimi Hendrix" as a possible cause.
Apparently someone experienced unusual sounds and colors while attending an old Hendrix concert. I wonder why that was?? Hahahaa!

On the slightly more serious side ... these sounds up in Canada are actually so loud in places that some people are being woken up by them in the middle of the night. Weird stuff.

Pete2