Fireball reported across California sky

Mike Denison, USA TODAY | USATODAY

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First a meteor hit Russia. Then an asteroid came unusually close to Earth. Now San Francisco may be the latest witness to a cosmic visitor.

Experts believe a "sporadic meteor" caused a fireball to streak across the western California sky Friday night, according to NBC's Bay Area affiliate.

A bright flash of light was first reported in Santa Rosa, Calif., around 7:45 p.m., and was seen as far south as San Jose and Morgan Hill.

It appeared to be bright green and turned yellow as it descended, according to a Bay Area resident who posted on NBC Bay Area's Facebook page. There have been no reports of damage following the incident.

Jonathan Braidman, an instructor at the Chabot Space and Science Center in Oakland, described the object based off reports as likely being a small piece of an asteroid that "somehow" got on a collision course with the earth.

"This is a very common occurrence," Braidman said. "What is uncommon is that it's so close to where people are living."

Astronomer Gerald McKeegan told NBC that the fireball was probably a "sporadic meteor." He added that sporadic meteors impact the Earth several times a day and can bring up to 15,000 tons of space debris per year to Earth.

No connections have been made between the California fireball and the meteorite that struck Russia on Friday or the asteroid that passed within 17,200 miles of Earth.

Contributing: The Associated Press