The Chino Hills earthquake was caused by oblique-slip faulting , with components of both thrust and sinistral strike-slip displacement . Preliminary reports cited the Whittier fault as the active cause , but the quake was later determined to have been generated by the " Yorba Linda trend , " as identified by Caltech seismologist Egill Hauksson . Its epicenter was within of Chino Hills and its hypocenter was c. deep . Initial estimations of the moderate main shock reported it as magnitude 5.8 , but this was later revised to magnitude 5.4 and in later months to a 5.5 . The main shock was reportedly felt as far south as San Diego , and Tijuana , Mexico , and as far east as Las Vegas , Nevada . It was the strongest earthquake to occur in the greater Los Angeles area since the 1994 Northridge earthquake
1994 Northridge earthquake
1994 Northridge earthquake
2008 Chino Hills earthquake