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National UFO Reporting Center
Sighting Report
Occurred : 8/5/2002 22:00 (Entered as : 080502 22:00)
Reported: 8/6/2002 4:22:49 PM 16:22
Posted: 3/11/2003
Location: Petaluma/Sausalito, CA
Shape: Flash
Duration:1 sec. each
Two white flashes light up Northern California sky

Driving home at night south on Hwy. 101 in Northern California in the Petaluma vicinity, I saw a white flash of light from an unknown source behind the hills that lit up the horizon in front of me. At first I surmised that maybe my eyes were playing tricks on me from the long drive I'd been doing from Reggae On The River, or maybe it was a reflection of oncoming cars' headlights, but then, about twenty minutes later when I was coming down the Waldo Grade toward the Golden Gate Bridge - it happened once again! The whole southern horizon beyond the city of San Francisco down below me lit up for a split second! Weather conditions were completely clear with no clouds, so I'm sure it couldn't have been lightning that caused it. I was astonished when the flash happened again the second time, thinking I might have been mistaken in what I'd seen at first some minutes and distance before. I could not see any craft or airplane in the sky either time, and I heard no noise as my windows were rolled up and the events must have been quite a distance away.

Observer is a professional person in her mid 40's that has resided in Bay Area for all of her lifetime, and has previously witnessed three other, more dramatic and detailed UFO events. Observer was not under the influence of alcohol, etc., as observer was driving at time of the event.