Did you hear a strange noise in Sioux Falls, South Dakota?

[Strange Sounds]

The strange sound phenomenon is not just in Forest Grove, Oregon. It has indeed been ringing occasionally for a while in Sioux Falls.

https://www.youtube.com/watch?v=kquFdx12ljs

Have You Heard Strange Noises in Sioux Falls in the last few weeks or so?

[jason]

Yes, I have been hearing this high pitched squeal that swells and oscillates like a tornado siren. It sounds like its coming out of the back yard then the front yard. My girlfriend cant hear it, but my dog sure can. And now that I look it up I see its happening in oregon too. Its not as loud here as the videos from oregon, and its not constant- it just comes and goes randomly. Its good to see im not going crazy, nobody else ive mentioned it to has heard it so I quit talking about it.

[Strange Sounds]

It seems that the loud booms aren’t stopping in the area at all:

‘Anyone else hear the 2 loud booms again early this morning? Around 4a.m. rattled the house pretty good. What the heck is going on? That’s twice now.’

Anyone else hear the 2 loud booms again early this morning? Around 4a.m. rattled the house pretty good. What the heck is going on? That's twice now.

Posted by Mandy Brekke on Monday, February 29, 2016

Some others are reporting booms in Clearfield County, Pennsylvania too:

The loud booms are back in Clearfield County.

Posted by Yvonne Kitchen Westover on Sunday, February 28, 2016

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