A magnitude 4.0 earthquake rattled the area of the Geysers Sunday morning.
According to the USGS, the quake was reported at around 9:14 a.m. just southwest of Clearlake.
The quake was initially reported as a preliminary magnitude 3.9, and was upgraded to 4.0 shortly after.
Reports indicate the quake had a depth of .7 km and was felt as far away as San Francisco.
No damage has been reported.
This is a developing story. Please check back for updates.