The U.S. Geological Survey Sunday morning is reporting a 3.6 magnitude aftershock about four miles southwest of Napa following an earlier 6.0 magnitude earthquake near American Canyon.
The aftershock was reported at 5:47 a.m. A 2.5 magnitude aftershock was reported at 5:01 a.m.
The earthquake was reported at 3:20 a.m.The U.S.G.S has also reported several smaller aftershocks following the earthquake.
The California Highway Patrol is reporting the westbound off-ramp of state Highway 37 and westbound Interstate Highway 80 to state Highway 37 are closed due to possible damage. The CHP is on the scene inspecting the roadways.
Damage has also been discovered on state Highway 121 at state Highway 129 in Napa. Parts of Congress Valley Road and Buhman Avenue have also been closed due to significant road damage, according to the CHP.
There has been major damage to buildings in Napa, and firefighters are battling at least one blaze that damaged several mobile homes.
There have also been reports of water main breaks and gas leaks. PG&E is reporting tens of thousands of customers are currently without power across the Bay Area, mainly in Napa and Sonoma counties.
There has been no reported damage to roadways in the South Bay, Peninsula and East Bay, according to the CHP. Officers are currently checking roads for obvious damage.
Bridges and roads are remaining open as they are being inspected.
Law enforcement and emergency agencies across the Bay Area are asking residents not to call 911 unless they have an emergency.
The Rohnert Park Department of Public Safety is reporting multiple power outages and alarms but hasn't had reports of any major injuries or damage.
The San Francisco Police Department hasn't had any reports of damage in San Francisco.
The earthquake was felt in several East Bay cities, San Francisco, as far north as Sacramento and as far south as San Jose.