Oc in two yorba linda fault caused quake 2008 08 01
The Yorba Linda Fault or Yorba Linda Trend is a fault system that extends from northeast Yorba Linda, California to the southeastern portion of the Chino Hills and Chino Hills (city), in Orange County, California.
The fault was discovered in the late 1990s and is known to have caused the MW5.4 2008 Chino Hills earthquake. The fault is believed to produce a MW6.0 earthquake at most.
References
Yorba Linda Fault Wikipedia(Text) CC BY-SA