NBC11 was flooded with calls from Bay Area drivers who a saw bright blue flash in the sky Thursday night.

So far, scientists don't now for sure what happened.

Astronomers do not think the flash was caused by recent sun flares, or last week's Leonid meteor shower.

Whatever it was, they don't believe it caused any damage.

Astronomer Brian Day said, "Most meteors burn completely in the atmosphere. This was big enough where something might have come down, but if it did, it was out over the Pacific Ocean."

Astronomers say it was likely a space rock that put on quite a light show when it burned up on its way through Earth's atmosphere.

It was seen as far away as Sacramento.