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National UFO Reporting Center
Sighting Report
Occurred : 7/31/1998 04:00 (Entered as : 7-31-98 04:00)
Reported: 7/31/1998 18:55
Posted: 3/11/2003
Location: Grass Valley, CA
Shape: Light
Duration:1 hr
Saw a light in sky. It did a strange turn. Heard a slow hum, not like airplane. Hum lasted for over half an hour. Light reappeared about half an hour after first sighting and was traveling with a fast speed at a slanted angle towards the ground, and dissapeared.

On the morning of July 31, 1998, at approximately 4.00 am, I saw a faint light in the sky, that appeared to be a star. I was alone outside, with the only other person a few feet away, sleeping in a tent. He did not observe the occurance. The light was moving, and suddenly it shifted, turning to reveal a brighttness. It then shrunk back into the smaller light, and dissapeared. I believe that the object was turning. At first, I thougth this was an airplane. I made this conclusion because there was a hum in the air, like an engine. I figured that the plane would be moving away quickly, and the hum would dissapear. However, this did not happen. The hum continued for over twenty minutes to half an hour, when the light reappear, further out towards the hills surrounding the area. However, this time the light was traveling downwards, at an inclined angel, and traveling at a quick speed. It moved downwards, and dissapeared. The hum still remained, but I feel asleep under the night sky before I could make another sighting.