The Southern California Earthquake Data Center (SCEDC) operates at the Seismological Laboratory at Caltech and is the primary archive of seismological data for southern California. They list 233 significant faults in this area. The Puente Hills fault is not listed. How many more faults are not identified? Obviously no one knows.
The Los Angeles metropolitan area is built on an active earthquake zone. I live in the west end of the San Fernando Valley. A distance of about 55 miles (Yes, Los Angeles Metro area is even bigger than that!) The 5.1 quake in La Habra resulted in a two to three second jerk motion at my home. If you were in motion you most likely did not even notice the movement. ABC television network news gave the impression that the entire city was impacted. That is an incorrect report.
Are earthquakes frightening? YES. Are earthquakes memorable? Rarely.
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