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.
Sierra Madre is a city in Los Angeles County, California whose population was 10,917 at the 2010 U.S. Census, up from 10,580 at the time of the 2000 U.S. Census. The city is located in the foothills of the San Gabriel Valley below the southern edge of the Angeles National Forest.