Earthquake Causes Tsunami Energy accumulates in the overriding plate until it exceeds the frictional forces between the two stuck plates. When this happens, the overriding plate snaps back into an unrestrained position.
Agoura Hills is a city in Los Angeles County, California. Its population was estimated to be at 20,843 in 2014, up from 20,537 at the 2000 census.
The northern boundary is the San Gabriel Mountains. The Chino Hills is the southern boundary that separates the Pomona Valley from northern Orange County. Historic U.S. Route 66 runs east-west across the north side of Pomona Valley. On March 1, 1893 the California Assembly voted 54-14 for a new county to form in the region, to be named San Antonio County, with Pomona as its seat.