Northern California faces the biggest earthquake with a magnitude of 6.0 in 25 years, causing injuries and damage to buildings.
As per the USGS the earthquake struck at 03:20 local time (10:20 GMT) four miles (6km) north-west of the town of American Canyon, at a depth of 6.7 miles.
Officials in Napa said in a statement that the quake had destroyed four mobile homes and made 16 buildings unfit to live in. it also cause “approximately 50” gas main breaks and around 30 leaks from water mains.
About 87 people have been taken to hospital in the Napa area, a renowned wine-producing region and tourist area.
Jerry Brown, the Governor of California has declared a state of emergency, to deal with the effects of the quake.