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National UFO Reporting Center
Sighting Report
Occurred : 2/9/2019 22:00 (Entered as : 02/09/19 22:00)
Reported: 2/17/2019 4:51:14 PM 16:51
Posted: 2/22/2019
Location: Vacaville, CA
Shape: Unknown
Duration:15 minutes
A loud deep vibration heard above in sky sounding like a train going overhead but never passed by.