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National UFO Reporting Center Sighting Report
Occurred : 2/25/2014 04:00 (Entered as : 2/25/14 4:00)
Reported: 2/25/2014 2:28:21 AM 02:28
Posted: 2/27/2014
Location: Evansville, IN
Duration: 30+ minutes
Loud low humming noise. Gradually getting louder then softer then louder again then softer and so on. Hum heard equally indoors as well as outside. Sounds like you can hear it coming over a building.

((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))