Source: http://www.huffingtonpost.com/2014/08/24/napa-earthquake-injuries_n_5704615.html

It hit Napa Valley in the San Francisco Bay area at around 3:20 am on 8/24. Widespread power outages, damage, and more. There's a state of emergency in the area.

It's the largest earthquake to hit in 25 years in that area and there's the potential for a 5.0 aftershock.

From the source:
"In Napa, at least three historic buildings were damaged, including the county courthouse, and at least two downtown commercial buildings have been severely damaged. A Red Cross evacuation center was set up at a high school, and crews were assessing damage to homes, bridges and roadways.

"There's collapses, fires," said Napa Fire Capt. Doug Bridewell, standing in front of large pieces of masonry that broke loose from a turn of the century office building where a fire had just been extinguished. "That's the worst shaking I've ever been in.""