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National UFO Reporting Center
Sighting Report
Occurred : 9/13/2015 22:00 (Entered as : 09/13/15 22:00)
Reported: 9/14/2015 4:36:15 PM 16:36
Posted: 9/17/2015
Location: Sioux Falls, SD
Shape:
Duration:30-60 minutes
Steady Humming Sound

Unexplained Noises From Sky On the evening of September 13, 2015, I was in the process of settling myself down for sleep, when I became aware of a humming sound. It seemed to sound like it was coming from outside.

I wouldn't say the sound was "noisy", but more like a steady hum.

Mid-tones. Steady.

I got up and went outside to investigate. The neighborhood was quiet, no dogs barking, no cars passing by.

The sound was all encompassing, yet I got the sense the sound seemed to have originated from the sky above. Northwest direction.

I tried to capture the sound on my tape recorder, but I was unsuccessful.

I was not frightened in any way, but curious more than anything.

I went back to bed, say, 40 minutes later, with the hum still continuing, before I drifted off to sleep.

I wish I had more details to give you.