IndyCar drivers tweet about California earthquake
SONOMA, California (August 24, 2014) —
(CNN) — A preliminary 6.0-magnitude earthquake hit the northern San Francisco Bay area early Sunday, the U.S. Geological Survey said.
The quake struck six miles southwest of Napa and nine miles from Sonoma, according to the USGS.
There were no immediate reports of injuries.
IndyCar drivers, in town for the Sonoma race, tweeted about the quake shortly after: