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National UFO Reporting Center Sighting Report
Occurred : 12/9/2016 21:50 (Entered as : 12/09/16 21:50)
Reported: 12/9/2016 10:48:15 PM 22:48
Posted: 12/15/2016
Location: Portland, OR
Shape: Flash
Duration: 10 seconds
Pulsing green light over portland

I was driving east and in my peripheral saw a bright flash to the north. I looked in that direction thinking it was lightning, and I saw that it was light green in color. It seemed to fade and pulse brighter. My next thought was that maybe a vehicle had collided with an electrical transformer (It has been snowing, so there is ice), but I heard no explosion. For about 10 seconds, it pulsed in brightness, until fading entirely.